diff --git a/build/Dockerfile b/build/Dockerfile
index ae1c6f7..49d37cd 100644
--- a/build/Dockerfile
+++ b/build/Dockerfile
@@ -13,6 +13,8 @@ LABEL maintainer="Xiaonan Shen <s@sxn.dev>"
 
 EXPOSE 25/tcp
 EXPOSE 143/tcp
+EXPOSE 1025/tcp
+EXPOSE 1143/tcp
 
 # Install dependencies and protonmail bridge
 RUN apt-get update \