diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 88eff18..9903a8e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -24,7 +24,7 @@ check_confluence_validity:
   extends: .generate-document
   stage: generate-docs
   variables:
-    OUTPUT_DIR: merge_requests
+    OUTPUT_DIR: "merge_requests"
   script:
     - check-validity
   artifacts:
@@ -35,7 +35,7 @@ pages:
   extends: .generate-document
   stage: generate-docs
   variables:
-    OUTPUT_DIR: public
+    OUTPUT_DIR: "public"
   script:
     - publish
   artifacts: