diff --git a/Dockerfile b/Dockerfile
index fd0360307..a7114eef7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,3 +12,5 @@ RUN yarn install --pure-lockfile
 RUN cp -r /opt/outline/node_modules /opt/node_modules
 
 CMD yarn build && yarn start
+
+EXPOSE 3000