diff --git a/src/JoliTypo/Bridge/Symfony/DependencyInjection/Configuration.php b/src/JoliTypo/Bridge/Symfony/DependencyInjection/Configuration.php
index 62c8d06..d02b4c4 100644
--- a/src/JoliTypo/Bridge/Symfony/DependencyInjection/Configuration.php
+++ b/src/JoliTypo/Bridge/Symfony/DependencyInjection/Configuration.php
@@ -17,7 +17,7 @@ class Configuration implements ConfigurationInterface
     /**
      * {@inheritdoc}
      */
-    public function getConfigTreeBuilder()
+    public function getConfigTreeBuilder(): TreeBuilder
     {
         $treeBuilder = new TreeBuilder('joli_typo');
         $rootNode = $this->getRootNode($treeBuilder, 'joli_typo');
diff --git a/src/JoliTypo/Bridge/Twig/JoliTypoExtension.php b/src/JoliTypo/Bridge/Twig/JoliTypoExtension.php
index 6f9f4c0..bc54677 100644
--- a/src/JoliTypo/Bridge/Twig/JoliTypoExtension.php
+++ b/src/JoliTypo/Bridge/Twig/JoliTypoExtension.php
@@ -21,14 +21,14 @@ public function __construct($presets)
         $this->presets = $presets;
     }
 
-    public function getFunctions()
+    public function getFunctions(): array
     {
         return [
             new \Twig\TwigFunction('jolitypo', [$this, 'translate']),
         ];
     }
 
-    public function getFilters()
+    public function getFilters(): array
     {
         return [
             new \Twig\TwigFilter('jolitypo', [$this, 'translate'], ['pre_escape' => 'html', 'is_safe' => ['html']]),
diff --git a/tests/JoliTypo/Tests/Bridge/app/AppKernel.php b/tests/JoliTypo/Tests/Bridge/app/AppKernel.php
index 02d4fff..61d6c70 100644
--- a/tests/JoliTypo/Tests/Bridge/app/AppKernel.php
+++ b/tests/JoliTypo/Tests/Bridge/app/AppKernel.php
@@ -19,7 +19,7 @@
 
 class AppKernel extends Kernel
 {
-    public function registerBundles()
+    public function registerBundles(): iterable
     {
         $bundles = [
             new FrameworkBundle(),
@@ -54,12 +54,12 @@ public function registerContainerConfiguration(LoaderInterface $loader)
         }
     }
 
-    public function getCacheDir()
+    public function getCacheDir(): string
     {
         return '/tmp/jolitypo/cache/'.$this->environment;
     }
 
-    public function getLogDir()
+    public function getLogDir(): string
     {
         return '/tmp/jolitypo/logs/'.$this->environment;
     }
diff --git a/tests/JoliTypo/Tests/JoliTypoTest.php b/tests/JoliTypo/Tests/JoliTypoTest.php
index ae073aa..2231ace 100644
--- a/tests/JoliTypo/Tests/JoliTypoTest.php
+++ b/tests/JoliTypo/Tests/JoliTypoTest.php
@@ -171,7 +171,7 @@ public function testNonHTMLContent()
 NOT_HTML;
 
         $this->assertEquals($fixed, $fixer->fix($toFix));
-        $this->assertEquals(html_entity_decode($fixed, null, 'UTF-8'), $fixer->fixString($toFix));
+        $this->assertEquals(html_entity_decode($fixed, \ENT_COMPAT, 'UTF-8'), $fixer->fixString($toFix));
         $this->assertEquals('Here is a “protip©”!', $fixer->fixString('Here is a "protip(c)"!'));
     }