diff --git a/src/templates/controller-class-template.php.tpl b/src/templates/controller-class-template.php.tpl
index 7be44e9..637a970 100644
--- a/src/templates/controller-class-template.php.tpl
+++ b/src/templates/controller-class-template.php.tpl
@@ -1,4 +1,6 @@
 <?php
+declare(strict_types=1);
+
 namespace __NAMESPACE_2_REPLACE__;
 
 use \Psr\Container\ContainerInterface;
diff --git a/tests/test-template-output/ExpectedFooBar.php b/tests/test-template-output/ExpectedFooBar.php
index 3574efb..a41d59d 100644
--- a/tests/test-template-output/ExpectedFooBar.php
+++ b/tests/test-template-output/ExpectedFooBar.php
@@ -1,4 +1,6 @@
 <?php
+declare(strict_types=1);
+
 namespace Test\Space;
 
 use \Psr\Container\ContainerInterface;