diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 9c9dbecc31dc454483329bcd06b76f2b1c7f1a12..b3fe34a897ba0fb717df994ccbd4b375a57f7512 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -10,7 +10,7 @@ format_json:
     - git remote add origin https://oauth2:$OAUTH_TOKEN@$CI_SERVER_HOST/$CI_PROJECT_PATH.git
   script:
     - echo "Current branch:" $CI_COMMIT_REF_NAME
-    - for file in Notebooks/*.ipynb; do jq --indent 1 . "$file" > tmp && mv tmp "$file"; done
+    - for file in Notebooks/*.ipynb; do jq --raw-output --sort-keys --indent 1 . "$file" > tmp && mv tmp "$file"; done
     - git config --global user.email "ci-bot@example.com"
     - git config --global user.name "CI Bot"
     - git fetch --unshallow