diff --git a/CHANGELOG.md b/CHANGELOG.md
index f571f4e..9613eff 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- [#5](https://github.com/green-code-initiative/ecoCode-python/pull/5) Upgrade licence system and licence headers of Java files
+
 ### Deleted
 
 ## [1.4.0] - 2023-08-08
diff --git a/pom.xml b/pom.xml
index 86c04b7..70d6375 100644
--- a/pom.xml
+++ b/pom.xml
@@ -9,6 +9,7 @@
 
     <name>ecoCode - Python language</name>
     <description>Provides rules to reduce the environmental footprint of your Python programs</description>
+    <inceptionYear>2023</inceptionYear>
     <url>https://github.com/green-code-initiative/ecoCode-python</url>
 
     <organization>
@@ -231,6 +232,34 @@
                     </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>com.mycila</groupId>
+                <artifactId>license-maven-plugin</artifactId>
+                <version>4.1</version>
+                <configuration>
+                    <properties>
+                        <owner>Green Code Initiative</owner>
+                        <email>https://www.ecocode.io</email>
+                    </properties>
+                    <licenseSets>
+                        <licenseSet>
+                            <header>com/mycila/maven/plugin/license/templates/GPL-3.txt</header>
+                            <includes>
+                                <include>**/*.java</include>
+                            </includes>
+                        </licenseSet>
+                    </licenseSets>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>validate</id>
+                        <goals>
+                            <goal>check</goal>
+                        </goals>
+                        <phase>validate</phase>
+                    </execution>
+                </executions>
+            </plugin>
         </plugins>
     </build>
 </project>
diff --git a/src/main/java/fr/greencodeinitiative/python/PythonPlugin.java b/src/main/java/fr/greencodeinitiative/python/PythonPlugin.java
index cb80125..69c3e11 100644
--- a/src/main/java/fr/greencodeinitiative/python/PythonPlugin.java
+++ b/src/main/java/fr/greencodeinitiative/python/PythonPlugin.java
@@ -1,15 +1,16 @@
 /*
- * Copyright (C) 2023 Green Code Initiative
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 3 of the License, or (at your option) any later version.
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
diff --git a/src/main/java/fr/greencodeinitiative/python/PythonRuleRepository.java b/src/main/java/fr/greencodeinitiative/python/PythonRuleRepository.java
index ce96d81..4374f3c 100644
--- a/src/main/java/fr/greencodeinitiative/python/PythonRuleRepository.java
+++ b/src/main/java/fr/greencodeinitiative/python/PythonRuleRepository.java
@@ -1,15 +1,16 @@
 /*
- * Copyright (C) 2023 Green Code Initiative
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 3 of the License, or (at your option) any later version.
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
diff --git a/src/main/java/fr/greencodeinitiative/python/checks/AvoidDoubleQuoteCheck.java b/src/main/java/fr/greencodeinitiative/python/checks/AvoidDoubleQuoteCheck.java
index e6b1912..11ccac3 100644
--- a/src/main/java/fr/greencodeinitiative/python/checks/AvoidDoubleQuoteCheck.java
+++ b/src/main/java/fr/greencodeinitiative/python/checks/AvoidDoubleQuoteCheck.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.python.checks;
 
 import org.sonar.check.Rule;
diff --git a/src/main/java/fr/greencodeinitiative/python/checks/AvoidFullSQLRequest.java b/src/main/java/fr/greencodeinitiative/python/checks/AvoidFullSQLRequest.java
index 8c6d4ee..7b1f470 100644
--- a/src/main/java/fr/greencodeinitiative/python/checks/AvoidFullSQLRequest.java
+++ b/src/main/java/fr/greencodeinitiative/python/checks/AvoidFullSQLRequest.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.python.checks;
 
 
diff --git a/src/main/java/fr/greencodeinitiative/python/checks/AvoidGettersAndSetters.java b/src/main/java/fr/greencodeinitiative/python/checks/AvoidGettersAndSetters.java
index beb063d..a88f4df 100644
--- a/src/main/java/fr/greencodeinitiative/python/checks/AvoidGettersAndSetters.java
+++ b/src/main/java/fr/greencodeinitiative/python/checks/AvoidGettersAndSetters.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.python.checks;
 
 import java.util.List;
diff --git a/src/main/java/fr/greencodeinitiative/python/checks/AvoidGlobalVariableInFunctionCheck.java b/src/main/java/fr/greencodeinitiative/python/checks/AvoidGlobalVariableInFunctionCheck.java
index 82bc46b..2d1af13 100644
--- a/src/main/java/fr/greencodeinitiative/python/checks/AvoidGlobalVariableInFunctionCheck.java
+++ b/src/main/java/fr/greencodeinitiative/python/checks/AvoidGlobalVariableInFunctionCheck.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.python.checks;
 
 import java.util.ArrayList;
diff --git a/src/main/java/fr/greencodeinitiative/python/checks/AvoidListComprehensionInIterations.java b/src/main/java/fr/greencodeinitiative/python/checks/AvoidListComprehensionInIterations.java
index 917d053..f9922b9 100644
--- a/src/main/java/fr/greencodeinitiative/python/checks/AvoidListComprehensionInIterations.java
+++ b/src/main/java/fr/greencodeinitiative/python/checks/AvoidListComprehensionInIterations.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.python.checks;
 
 import org.sonar.check.Rule;
diff --git a/src/main/java/fr/greencodeinitiative/python/checks/AvoidMultipleIfElseStatementCheck.java b/src/main/java/fr/greencodeinitiative/python/checks/AvoidMultipleIfElseStatementCheck.java
index 1b70bab..b625257 100644
--- a/src/main/java/fr/greencodeinitiative/python/checks/AvoidMultipleIfElseStatementCheck.java
+++ b/src/main/java/fr/greencodeinitiative/python/checks/AvoidMultipleIfElseStatementCheck.java
@@ -1,21 +1,19 @@
 /*
- * SonarQube PHP Custom Rules Example
- * Copyright (C) 2016-2016 SonarSource SA
- * mailto:contact AT sonarsource DOT com
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 3 of the License, or (at your option) any later version.
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 package fr.greencodeinitiative.python.checks;
 
diff --git a/src/main/java/fr/greencodeinitiative/python/checks/AvoidSQLRequestInLoop.java b/src/main/java/fr/greencodeinitiative/python/checks/AvoidSQLRequestInLoop.java
index a2bb207..b95b37f 100644
--- a/src/main/java/fr/greencodeinitiative/python/checks/AvoidSQLRequestInLoop.java
+++ b/src/main/java/fr/greencodeinitiative/python/checks/AvoidSQLRequestInLoop.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.python.checks;
 
 import java.util.Arrays;
diff --git a/src/main/java/fr/greencodeinitiative/python/checks/AvoidTryCatchFinallyCheck.java b/src/main/java/fr/greencodeinitiative/python/checks/AvoidTryCatchFinallyCheck.java
index be801c4..8854149 100644
--- a/src/main/java/fr/greencodeinitiative/python/checks/AvoidTryCatchFinallyCheck.java
+++ b/src/main/java/fr/greencodeinitiative/python/checks/AvoidTryCatchFinallyCheck.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.python.checks;
 
 import org.sonar.check.Rule;
diff --git a/src/main/java/fr/greencodeinitiative/python/checks/AvoidUnoptimizedVectorImagesCheck.java b/src/main/java/fr/greencodeinitiative/python/checks/AvoidUnoptimizedVectorImagesCheck.java
index f3a9c36..87c36cf 100644
--- a/src/main/java/fr/greencodeinitiative/python/checks/AvoidUnoptimizedVectorImagesCheck.java
+++ b/src/main/java/fr/greencodeinitiative/python/checks/AvoidUnoptimizedVectorImagesCheck.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.python.checks;
 
 import java.util.regex.Matcher;
diff --git a/src/main/java/fr/greencodeinitiative/python/checks/DetectUnoptimizedImageFormat.java b/src/main/java/fr/greencodeinitiative/python/checks/DetectUnoptimizedImageFormat.java
index a69599a..02da377 100644
--- a/src/main/java/fr/greencodeinitiative/python/checks/DetectUnoptimizedImageFormat.java
+++ b/src/main/java/fr/greencodeinitiative/python/checks/DetectUnoptimizedImageFormat.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.python.checks;
 
 import org.sonar.check.Rule;
diff --git a/src/main/java/fr/greencodeinitiative/python/checks/NoFunctionCallWhenDeclaringForLoop.java b/src/main/java/fr/greencodeinitiative/python/checks/NoFunctionCallWhenDeclaringForLoop.java
index b0bf302..bf93918 100644
--- a/src/main/java/fr/greencodeinitiative/python/checks/NoFunctionCallWhenDeclaringForLoop.java
+++ b/src/main/java/fr/greencodeinitiative/python/checks/NoFunctionCallWhenDeclaringForLoop.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.python.checks;
 
 import org.sonar.check.Rule;
diff --git a/src/main/java/fr/greencodeinitiative/python/package-info.java b/src/main/java/fr/greencodeinitiative/python/package-info.java
index 51a7a57..23f6e32 100644
--- a/src/main/java/fr/greencodeinitiative/python/package-info.java
+++ b/src/main/java/fr/greencodeinitiative/python/package-info.java
@@ -1,15 +1,16 @@
 /*
- * Copyright (C) 2023 Green Code Initiative
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 3 of the License, or (at your option) any later version.
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
diff --git a/src/test/java/fr/greencodeinitiative/python/PythonPluginTest.java b/src/test/java/fr/greencodeinitiative/python/PythonPluginTest.java
index e270ad4..78af6e3 100644
--- a/src/test/java/fr/greencodeinitiative/python/PythonPluginTest.java
+++ b/src/test/java/fr/greencodeinitiative/python/PythonPluginTest.java
@@ -1,15 +1,16 @@
 /*
- * Copyright (C) 2023 Green Code Initiative
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 3 of the License, or (at your option) any later version.
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
diff --git a/src/test/java/fr/greencodeinitiative/python/PythonRuleRepositoryTest.java b/src/test/java/fr/greencodeinitiative/python/PythonRuleRepositoryTest.java
index eab6da2..ca37f45 100644
--- a/src/test/java/fr/greencodeinitiative/python/PythonRuleRepositoryTest.java
+++ b/src/test/java/fr/greencodeinitiative/python/PythonRuleRepositoryTest.java
@@ -1,15 +1,16 @@
 /*
- * Copyright (C) 2023 Green Code Initiative
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 3 of the License, or (at your option) any later version.
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
diff --git a/src/test/java/fr/greencodeinitiative/python/checks/AvoidDoubleQuoteTest.java b/src/test/java/fr/greencodeinitiative/python/checks/AvoidDoubleQuoteTest.java
index 1079b10..5620e8e 100644
--- a/src/test/java/fr/greencodeinitiative/python/checks/AvoidDoubleQuoteTest.java
+++ b/src/test/java/fr/greencodeinitiative/python/checks/AvoidDoubleQuoteTest.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.python.checks;
 
 import org.junit.Test;
diff --git a/src/test/java/fr/greencodeinitiative/python/checks/AvoidFullSQLRequestTest.java b/src/test/java/fr/greencodeinitiative/python/checks/AvoidFullSQLRequestTest.java
index e03a71f..6aa5dae 100644
--- a/src/test/java/fr/greencodeinitiative/python/checks/AvoidFullSQLRequestTest.java
+++ b/src/test/java/fr/greencodeinitiative/python/checks/AvoidFullSQLRequestTest.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.python.checks;
 
 import org.junit.Test;
diff --git a/src/test/java/fr/greencodeinitiative/python/checks/AvoidGettersAndSettersTest.java b/src/test/java/fr/greencodeinitiative/python/checks/AvoidGettersAndSettersTest.java
index 26d7b4d..c68228e 100644
--- a/src/test/java/fr/greencodeinitiative/python/checks/AvoidGettersAndSettersTest.java
+++ b/src/test/java/fr/greencodeinitiative/python/checks/AvoidGettersAndSettersTest.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.python.checks;
 
 import org.junit.Test;
diff --git a/src/test/java/fr/greencodeinitiative/python/checks/AvoidGlobalVariableInFunctionCheckTest.java b/src/test/java/fr/greencodeinitiative/python/checks/AvoidGlobalVariableInFunctionCheckTest.java
index c58ed4b..5f716d3 100644
--- a/src/test/java/fr/greencodeinitiative/python/checks/AvoidGlobalVariableInFunctionCheckTest.java
+++ b/src/test/java/fr/greencodeinitiative/python/checks/AvoidGlobalVariableInFunctionCheckTest.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.python.checks;
 
 import org.junit.Test;
diff --git a/src/test/java/fr/greencodeinitiative/python/checks/AvoidListComprehensionInIterationsTest.java b/src/test/java/fr/greencodeinitiative/python/checks/AvoidListComprehensionInIterationsTest.java
index 8e722c2..d613698 100644
--- a/src/test/java/fr/greencodeinitiative/python/checks/AvoidListComprehensionInIterationsTest.java
+++ b/src/test/java/fr/greencodeinitiative/python/checks/AvoidListComprehensionInIterationsTest.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.python.checks;
 
 import org.junit.Test;
diff --git a/src/test/java/fr/greencodeinitiative/python/checks/AvoidMultipleIfElseStatementCheckTest.java b/src/test/java/fr/greencodeinitiative/python/checks/AvoidMultipleIfElseStatementCheckTest.java
index 58da782..51f4b07 100644
--- a/src/test/java/fr/greencodeinitiative/python/checks/AvoidMultipleIfElseStatementCheckTest.java
+++ b/src/test/java/fr/greencodeinitiative/python/checks/AvoidMultipleIfElseStatementCheckTest.java
@@ -1,21 +1,19 @@
 /*
- * SonarQube PHP Custom Rules Example
- * Copyright (C) 2016-2016 SonarSource SA
- * mailto:contact AT sonarsource DOT com
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 3 of the License, or (at your option) any later version.
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 package fr.greencodeinitiative.python.checks;
 
diff --git a/src/test/java/fr/greencodeinitiative/python/checks/AvoidSQLRequestInLoopTest.java b/src/test/java/fr/greencodeinitiative/python/checks/AvoidSQLRequestInLoopTest.java
index a982bf0..0cf4e28 100644
--- a/src/test/java/fr/greencodeinitiative/python/checks/AvoidSQLRequestInLoopTest.java
+++ b/src/test/java/fr/greencodeinitiative/python/checks/AvoidSQLRequestInLoopTest.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.python.checks;
 
 import org.junit.Test;
diff --git a/src/test/java/fr/greencodeinitiative/python/checks/AvoidTryCatchFinallyCheckTest.java b/src/test/java/fr/greencodeinitiative/python/checks/AvoidTryCatchFinallyCheckTest.java
index 03450d0..0f1bc57 100644
--- a/src/test/java/fr/greencodeinitiative/python/checks/AvoidTryCatchFinallyCheckTest.java
+++ b/src/test/java/fr/greencodeinitiative/python/checks/AvoidTryCatchFinallyCheckTest.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.python.checks;
 
 
diff --git a/src/test/java/fr/greencodeinitiative/python/checks/AvoidUnoptimizedVectorImagesTest.java b/src/test/java/fr/greencodeinitiative/python/checks/AvoidUnoptimizedVectorImagesTest.java
index 09a7385..6559016 100644
--- a/src/test/java/fr/greencodeinitiative/python/checks/AvoidUnoptimizedVectorImagesTest.java
+++ b/src/test/java/fr/greencodeinitiative/python/checks/AvoidUnoptimizedVectorImagesTest.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.python.checks;
 
 import org.junit.Test;
diff --git a/src/test/java/fr/greencodeinitiative/python/checks/DetectUnoptimizedImageFormatTest.java b/src/test/java/fr/greencodeinitiative/python/checks/DetectUnoptimizedImageFormatTest.java
index 7c735f5..c7978f9 100644
--- a/src/test/java/fr/greencodeinitiative/python/checks/DetectUnoptimizedImageFormatTest.java
+++ b/src/test/java/fr/greencodeinitiative/python/checks/DetectUnoptimizedImageFormatTest.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.python.checks;
 
 import org.junit.Test;
diff --git a/src/test/java/fr/greencodeinitiative/python/checks/NoFunctionCallWhenDeclaringForLoopTest.java b/src/test/java/fr/greencodeinitiative/python/checks/NoFunctionCallWhenDeclaringForLoopTest.java
index 77b1feb..06a5242 100644
--- a/src/test/java/fr/greencodeinitiative/python/checks/NoFunctionCallWhenDeclaringForLoopTest.java
+++ b/src/test/java/fr/greencodeinitiative/python/checks/NoFunctionCallWhenDeclaringForLoopTest.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - Python language - Provides rules to reduce the environmental footprint of your Python programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.python.checks;
 
 import org.junit.Test;