diff --git a/Dockerfile b/Dockerfile
index 2c15dc6c..3c87c46f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -56,7 +56,6 @@ COPY --link --chmod=755 docker-entrypoint.sh /usr/local/bin/
 
 RUN apk add --no-cache su-exec
 
-ENV HOSTNAME=::
 ENV PORT=3000
 EXPOSE $PORT