diff --git a/action.yml b/action.yml
index 8ced4d7..8b47146 100644
--- a/action.yml
+++ b/action.yml
@@ -12,4 +12,4 @@ name: 'OSKAR-PHP-CS-Fixer'
 
 runs:
     using: 'docker'
-    image: 'docker://oskarstark/php-cs-fixer-ga:3.8.0'
+    image: 'docker://oskarstark/php-cs-fixer-ga:3.9.4'