diff --git a/caas.Dockerfile b/caas.Dockerfile
index 402e495..e52a74c 100644
--- a/caas.Dockerfile
+++ b/caas.Dockerfile
@@ -2,3 +2,4 @@ FROM nginx:latest
 COPY cats /usr/share/nginx/html/cats
 COPY nginx.conf /etc/nginx/nginx.conf
 COPY default.conf /etc/nginx/conf.d/default.conf
+EXPOSE 80