diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index eca9429ab942059f57fc849d89cc5897deaee803..8d8f10df39d69a6ed7c7e4c59f6d18c4f32988fe 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -76,7 +76,7 @@ create_perlcritic_rapport:
 
 # PHP codesniffer
 create_php_code_sniffer_rapport:
-  image: php:cli-stretch
+  image: php:5.6.33-cli-jessie
   stage: codestyle
   only:
     - branches