diff --git a/Dockerfile b/Dockerfile
index fe8cda0f1..a6faf008c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -44,7 +44,7 @@ COPY --from=builder /app/.next/server ./.next/server
 EXPOSE 3000
 
 CMD if [ -n "$PROXY_URL" ]; then \
-    export HOSTNAME="127.0.0.1"; \
+    unset HOSTNAME; \
     protocol=$(echo $PROXY_URL | cut -d: -f1); \
     host=$(echo $PROXY_URL | cut -d/ -f3 | cut -d: -f1); \
     port=$(echo $PROXY_URL | cut -d: -f3); \