diff --git a/gitlabci/docker-hub.yml b/gitlabci/docker-hub.yml
index 0facc75..b97a361 100644
--- a/gitlabci/docker-hub.yml
+++ b/gitlabci/docker-hub.yml
@@ -6,7 +6,7 @@ docker-hub-build:
   script:
     - cd $CI_PROJECT_DIR
     - apk add --no-cache curl
-    - SQUID_VERSION=`curl -s http://www.squid-cache.org/Versions/v4/ | egrep -m 1 -oh squid-.*.tar.gz | cut -d '"' -f1`
+    - export SQUID_VERSION=$(curl -s http://www.squid-cache.org/Versions/v4/ | egrep -m 1 -oh squid-.*.tar.gz | cut -d '"' -f1)
     - docker build --build-arg SQUID_VERSION="$CI_COMMIT_BRANCH" --pull -t $CONTAINER_BUILD_NOPROD_NAME .
     - docker push $CONTAINER_BUILD_NOPROD_NAME
 
@@ -15,6 +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"
 
 .services:
   services: