diff --git a/pdns-admin-static-ngoduykhanh/Dockerfile b/pdns-admin-static-ngoduykhanh/Dockerfile
index ff6aa25..28e5e8a 100644
--- a/pdns-admin-static-ngoduykhanh/Dockerfile
+++ b/pdns-admin-static-ngoduykhanh/Dockerfile
@@ -5,6 +5,8 @@ RUN dnf -y --setopt=install_weak_deps=False install \
     nginx \
   && dnf clean all
 
+EXPOSE 80
+
 COPY pdns-nginx.conf /etc/nginx/nginx.conf
 
 CMD [ "/usr/sbin/nginx", "-g", "daemon off;" ]