diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index c8cf50cb1de2bbadf8ac38baf9327307228b31e1..a012b031f8ec9b99eee07669f3611a13d61f5961 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -65,7 +65,7 @@ test:mutation:
     - composer config cache-dir /cache/composer
     - mkdir $TYPO3_PATH_WEB/fileadmin/ && touch $TYPO3_PATH_WEB/fileadmin/currentcoredata.json
   script:
-    - composer selfupdate --1
+    - composer selfupdate --2
     - composer install --ignore-platform-reqs
     - ./vendor/bin/infection --min-msi=10 --min-covered-msi=75 --threads=4
   artifacts: