diff --git a/example_app/.idea/misc.xml b/example_app/.idea/misc.xml
index 51fa3e5b2..b3ebd6678 100644
--- a/example_app/.idea/misc.xml
+++ b/example_app/.idea/misc.xml
@@ -5,7 +5,7 @@
     <option name="myDefaultNotNull" value="android.support.annotation.NonNull" />
     <option name="myNullables">
       <value>
-        <list size="10">
+        <list size="12">
           <item index="0" class="java.lang.String" itemvalue="org.jetbrains.annotations.Nullable" />
           <item index="1" class="java.lang.String" itemvalue="javax.annotation.Nullable" />
           <item index="2" class="java.lang.String" itemvalue="javax.annotation.CheckForNull" />
@@ -16,12 +16,14 @@
           <item index="7" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.qual.Nullable" />
           <item index="8" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NullableDecl" />
           <item index="9" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NullableType" />
+          <item index="10" class="java.lang.String" itemvalue="android.annotation.Nullable" />
+          <item index="11" class="java.lang.String" itemvalue="com.android.annotations.Nullable" />
         </list>
       </value>
     </option>
     <option name="myNotNulls">
       <value>
-        <list size="9">
+        <list size="11">
           <item index="0" class="java.lang.String" itemvalue="org.jetbrains.annotations.NotNull" />
           <item index="1" class="java.lang.String" itemvalue="javax.annotation.Nonnull" />
           <item index="2" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.NonNull" />
@@ -31,11 +33,13 @@
           <item index="6" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.qual.NonNull" />
           <item index="7" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NonNullDecl" />
           <item index="8" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NonNullType" />
+          <item index="9" class="java.lang.String" itemvalue="android.annotation.NonNull" />
+          <item index="10" class="java.lang.String" itemvalue="com.android.annotations.NonNull" />
         </list>
       </value>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" project-jdk-name="JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">
diff --git a/example_app/app/build.gradle b/example_app/app/build.gradle
index b8a103cd2..d4a8417bc 100644
--- a/example_app/app/build.gradle
+++ b/example_app/app/build.gradle
@@ -74,7 +74,11 @@ android {
                      ]
         }
     }
-
+    compileOptions {
+        sourceCompatibility = 1.8
+        targetCompatibility = 1.8
+    }
+    buildToolsVersion = '29.0.3'
 
 
 }
@@ -85,7 +89,7 @@ dependencies {
     implementation 'com.android.support.constraint:constraint-layout:1.1.3'
     implementation 'com.android.support:design:28.0.0'
     testImplementation 'org.mockito:mockito-core:1.10.19'
-    testImplementation 'junit:junit:4.12'
+    testImplementation 'junit:junit:4.13'
     androidTestImplementation 'com.android.support.test:runner:1.0.2'
     androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
 }
diff --git a/example_app/app/src/main/cpp/native-lib.cpp b/example_app/app/src/main/cpp/native-lib.cpp
index 6be8f3fe8..3ba5c1db3 100644
--- a/example_app/app/src/main/cpp/native-lib.cpp
+++ b/example_app/app/src/main/cpp/native-lib.cpp
@@ -18,7 +18,7 @@ Java_com_example_declan_myapplication_MainActivity_stringFromJNI(
         JNIEnv *env,
         jobject /* this */) {
 
-    string Str = "Hello from C++";
+    string Str = "Hello from C++\n";
 
     //-------------------------------------
     boost::chrono::system_clock::time_point p  = boost::chrono::system_clock::now();
diff --git a/example_app/build.gradle b/example_app/build.gradle
index 4244a30c5..ded884a66 100644
--- a/example_app/build.gradle
+++ b/example_app/build.gradle
@@ -7,7 +7,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.1'
+        classpath 'com.android.tools.build:gradle:3.5.3'
         
 
         // NOTE: Do not place your application dependencies here; they belong
diff --git a/example_app/local.properties b/example_app/local.properties
index 8c1913c1e..b8fa5576f 100644
--- a/example_app/local.properties
+++ b/example_app/local.properties
@@ -4,12 +4,7 @@
 # Location of the SDK. This is only used by Gradle.
 # For customization when using a Version Control System, please read the
 # header note.
-#Fri Mar 22 15:38:23 CET 2019
-
-
-
-sdk.dir=/home/declan/zone/mid/lib/android/sdk
-ndk.dir=/home/declan/zone/low/boost/down/ndk/20
-
-# boost install dir: should directly contain "include", "libs" subdirs
-boost.dir=/home/declan/zone/low/boost/Boost-for-Android/build/install
+#Fri Jan 31 15:12:14 CET 2020
+ndk.dir=/home/declan/Documents/zone/mid/bin/android/sdk/ndk/21.0.6113669
+boost.dir=/home/declan/Documents/zone/low/boost/Boost-for-Android/build/ndk_21_boost_1.72.0
+sdk.dir=/home/declan/Documents/zone/mid/bin/android/sdk
diff --git a/example_app/screenshot.png b/example_app/screenshot.png
old mode 100755
new mode 100644
index 70dc66b78..6ffe79b35
Binary files a/example_app/screenshot.png and b/example_app/screenshot.png differ