diff --git a/boxgenerator/docker-compose.yml b/boxgenerator/docker-compose.yml
index 71e1ea3..0fccaf0 100644
--- a/boxgenerator/docker-compose.yml
+++ b/boxgenerator/docker-compose.yml
@@ -22,8 +22,8 @@ services:
       context: .
       dockerfile: Dockerfile
       args:
-        - BUILD_BRANCH=master
-        - BUILD_REPO=https://github.com/florianfesti/boxes.git
+        - BUILD_BRANCH= master
+        - BUILD_REPO= https://github.com/florianfesti/boxes.git
     # Install requirements
     init: true
     entrypoint: