diff --git a/Dockerfile b/Dockerfile
index 99c37b44..6642d79e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,8 +3,8 @@ FROM denoland/deno:1.44.2
 ARG DITTO_DOMAIN
 ARG DITTO_UPLOADER_CONFIG
 
-ENV DITTO_DOMAIN ${DITTO_DOMAIN}
-ENV DITTO_UPLOADER_CONFIG ${DITTO_UPLOADER_CONFIG}
+ENV DITTO_DOMAIN=${DITTO_DOMAIN}
+ENV DITTO_UPLOADER_CONFIG=${DITTO_UPLOADER_CONFIG}
 ENV PORT 5000
 
 EXPOSE 5000