diff --git a/Dockerfile b/Dockerfile
index fd922d0..2c4838a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -29,7 +29,6 @@ echo "**** fetch source code ****" && \
 	/tmp/sync --strip-components=1 && \
  echo "**** compile syncthing  ****" && \
  cd /tmp/sync && \
- rm -f go.sum && \
  go clean -modcache && \
  CGO_ENABLED=0 go run build.go \
 	-no-upgrade \
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index c3117e8..bd28a57 100644
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -29,7 +29,6 @@ echo "**** fetch source code ****" && \
 	/tmp/sync --strip-components=1 && \
  echo "**** compile syncthing  ****" && \
  cd /tmp/sync && \
- rm -f go.sum && \
  go clean -modcache && \
  CGO_ENABLED=0 go run build.go \
 	-no-upgrade \
diff --git a/Dockerfile.armhf b/Dockerfile.armhf
index b31b738..390f0d1 100644
--- a/Dockerfile.armhf
+++ b/Dockerfile.armhf
@@ -29,7 +29,6 @@ echo "**** fetch source code ****" && \
 	/tmp/sync --strip-components=1 && \
  echo "**** compile syncthing  ****" && \
  cd /tmp/sync && \
- rm -f go.sum && \
  go clean -modcache && \
  CGO_ENABLED=0 go run build.go \
 	-no-upgrade \