diff --git a/Dockerfile b/Dockerfile
index 348d617..4e60329 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -10,6 +10,7 @@ ENV LANG="en_US.UTF-8" \
   PORTAINER_URL="" \
   PORTAINER_STACK_NAME="" \
   DOCKER_COMPOSE_FILE="" \
+  ENVIRONMENT_VARIABLES_FILE="" \
   PORTAINER_PRUNE="false" \
   PORTAINER_ENDPOINT="1" \
   HTTPIE_VERIFY_SSL="yes" \