diff --git a/Dockerfile b/Dockerfile
index 6ca7a59b..eac03164 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -42,7 +42,7 @@ EXPOSE 3000
 
 CMD if [ -n "$PROXY_URL" ]; then \
         if [ -z "$HOSTNAME" ]; then \
-          export HOSTNAME="127.0.0.1" \
+          export HOSTNAME="127.0.0.1"; \
         fi; \
         protocol=$(echo $PROXY_URL | cut -d: -f1); \
         host=$(echo $PROXY_URL | cut -d/ -f3 | cut -d: -f1); \