diff --git a/Dockerfile b/Dockerfile
index 4d54803..9beb391 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -35,7 +35,7 @@ RUN apk add --no-cache \
  && setcap cap_net_bind_service=+ep /usr/local/bin/coredns \
  && cd / \
  && apk del .build-deps \
- && rm -rf /tmp/gopath
+ && rm -rf /tmp/gopath /root/.cache/go-build
 
 COPY docker/root /