diff --git a/build/Dockerfile b/build/Dockerfile
index cb29500..036f7f4 100644
--- a/build/Dockerfile
+++ b/build/Dockerfile
@@ -12,21 +12,20 @@ RUN apt-get update && apt-get install -y \
 # Build
 ADD https://github.com/ProtonMail/proton-bridge.git#${VERSION} /build/
 WORKDIR /build/
-RUN make build-nogui vault-editor
-
-COPY build.sh /build/
-RUN bash build.sh
+RUN sed -i 's/127.0.0.1/0.0.0.0/g' internal/constants/constants.go
+RUN set -eux; \
+    make build-nogui vault-editor
 
 FROM ubuntu:latest
 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 \
     && apt-get install -y --no-install-recommends \
-        socat pass libsecret-1-0 ca-certificates libfido2-1 \
+        pass libsecret-1-0 ca-certificates libfido2-1 \
         dbus dbus-x11 gnupg2 \
     && rm -rf /var/lib/apt/lists/*
 
diff --git a/build/build.sh b/build/build.sh
deleted file mode 100644
index 98a0341..0000000
--- a/build/build.sh
+++ /dev/null
@@ -1,19 +0,0 @@
-#!/bin/bash
-
-set -ex
-
-# Clone new code
-sed -i 's/127.0.0.1/0.0.0.0/g' internal/constants/constants.go
-
-ARCH=$(uname -m)
-if [[ $ARCH == "armv7l" ]] ; then
-	# This is expected to fail, and we use the following patch to fix
-	make build-nogui || true
-	# For 32bit architectures, there was a overflow error on the parser
-	# This is a workaround for this problem found at:
-	#   https://github.com/antlr/antlr4/issues/2433#issuecomment-774514106
-	find $(go env GOPATH)/pkg/mod/github.com/\!proton\!mail/go-rfc5322*/ -type f -exec sed -i.bak 's/(1<</(int64(1)<</g' {} +
-fi
-
-# Build
-make build-nogui