diff --git a/build/Dockerfile b/build/Dockerfile
index e90ff25..58d6f25 100644
--- a/build/Dockerfile
+++ b/build/Dockerfile
@@ -16,6 +16,8 @@ LABEL maintainer="Simon Felding <sife@adm.ku.dk>"
 
 EXPOSE 25/tcp
 EXPOSE 143/tcp
+EXPOSE 1025/tcp
+EXPOSE 1143/tcp
 
 # Install dependencies and protonmail bridge
 RUN apt-get update \