diff --git a/gitlabci/docker-hub.yml b/gitlabci/docker-hub.yml
index b97a361..b34a0bf 100644
--- a/gitlabci/docker-hub.yml
+++ b/gitlabci/docker-hub.yml
@@ -15,7 +15,7 @@ variables:
   CONTAINER_CLIENT_IMAGE: debian:buster      
   CONTAINER_TEST_NAME: squid
   CONTAINER_BUILD_NOPROD_NAME: $HUB_REGISTRY_IMAGE:build-noprod
-  SQUID_VERSION: '"$SQUID_VERSION"
+  SQUID_VERSION: '"$SQUID_VERSION"'
 
 .services:
   services: