diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 32fee017c..05a2ac815 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,5 +1,5 @@
 variables:
-  GIT_SUBMODULE_STRATEGY=recursive
+  GIT_SUBMODULE_STRATEGY: recursive
 
 before_script: