diff --git a/Dockerfile b/Dockerfile
index 3807457..2e90e5a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,6 +5,7 @@ COPY . /redis-audit
 RUN set -ex; \
     apk --no-cache add build-base; \
     cd redis-audit; \
+    bundle update --bundler; \
     bundle install; \
     apk del build-base;