diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 80fead8..bee7177 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -42,3 +42,5 @@ deploy:
     - chmod 700 ~/.ssh
   script:
     - ssh -o StrictHostKeyChecking=no -p $SSH_PORT $SSH_DESTINATION "cd $PATH_TO_APPLICATION; $UPGRADE_COMMAND;"
+  only:
+    - master
diff --git a/Dockerfile b/Dockerfile
index 9d2cde8..0dd7fe6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM registry.gitlab.com/lovallat/php-apache-pagespeed:latest
+FROM registry.gitlab.com/lovallat/php-apache-pagespeed:master
 
 EXPOSE 80