diff --git a/boxgenerator/docker-compose.yml b/boxgenerator/docker-compose.yml
index 09245ca..71e1ea3 100644
--- a/boxgenerator/docker-compose.yml
+++ b/boxgenerator/docker-compose.yml
@@ -5,8 +5,8 @@ services:
     ports:
       - "${EXTERNAL_PORT:-8000}:8000"
     environment:
-      BUILD_BRANCH: ${BUILD_BRANCH:-master}
-      BUILD_REPO: ${BUILD_REPO:-https://github.com/florianfesti/boxes.git}
+      BUILD_BRANCH: master
+      BUILD_REPO: https://github.com/florianfesti/boxes.git
     volumes:
       - ./boxes:/boxes
     command: /boxes/scripts/boxesserver
@@ -22,8 +22,8 @@ services:
       context: .
       dockerfile: Dockerfile
       args:
-        - BUILD_BRANCH=${BUILD_BRANCH:-master}
-        - BUILD_REPO=${BUILD_REPO:-https://github.com/florianfesti/boxes.git}
+        - BUILD_BRANCH=master
+        - BUILD_REPO=https://github.com/florianfesti/boxes.git
     # Install requirements
     init: true
     entrypoint: