diff --git a/Dockerfile b/Dockerfile
index 305fcce0b..f462eee94 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,8 @@ ARG BUILD_FROM
 FROM $BUILD_FROM
 
 ENV \
-    S6_SERVICES_GRACETIME=10000
+    S6_SERVICES_GRACETIME=10000 \
+    SUPERVISOR_API=http://localhost
 
 # Install base
 RUN \