diff --git a/dockerfiles/bookworm.Dockerfile b/dockerfiles/bookworm.Dockerfile
index 87260a0..402df1e 100644
--- a/dockerfiles/bookworm.Dockerfile
+++ b/dockerfiles/bookworm.Dockerfile
@@ -25,7 +25,6 @@ RUN \
 
 RUN \
   --mount=type=cache,id=usr-local-bundle-cache-${TARGETARCH},target=${BUNDLE_PATH},sharing=locked \
-  gem update --system --no-document; \
   gem install -N bundler
 
 ENV DEBIAN_FRONTEND="noninteractive"