diff --git a/Dockerfile b/Dockerfile
index e615bc9..5d5bb94 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,5 +4,6 @@ RUN apk add --update ca-certificates
 RUN mkdir -p /usr/local/godns
 COPY godns /usr/local/godns
 RUN chmod +x /usr/local/godns/godns
+RUN rm -rf /var/cache/apk/*
 WORKDIR /usr/local/godns
 ENTRYPOINT ["./godns", "-d"]