diff --git a/docker-compose.yml b/docker-compose.yml
index 9bc7702..ea19345 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -12,7 +12,7 @@
         - GITBUCKET_DATABASE_NAME=${GITBUCKET_DATABASE_NAME}
         - GITBUCKET_DATABASE_USER=${GITBUCKET_DATABASE_USER}
         - GITBUCKET_DATABASE_PASSWORD=${GITBUCKET_DATABASE_PASSWORD}
-        - TZ={TZ}
+        - TZ=${TZ}
       volumes:
         - ./data/repositories/:/srv/gitbucket/repositories/
         - ./data/data/:/srv/gitbucket/data/