diff --git a/Dockerfile b/Dockerfile
index 585ebd7..da8211a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,7 @@
 FROM alpine/helm:3.10.2 as helm
 
 RUN set -ex \
+    && apk upgrade \
     && apk add --no-cache bash \
     && helm plugin install https://github.com/chartmuseum/helm-push \
     \