diff --git a/Dockerfile b/Dockerfile
index 114fa8e..5db05af 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,4 +7,6 @@ RUN pip install --no-cache-dir -r requirements.txt
 
 COPY game_collection .
 
-CMD [ "flask", "run", "--host=0.0.0.0" ]
+EXPOSE 3004
+
+CMD [ "flask", "run", "--host=0.0.0.0", "--port=3004" ]