diff --git a/Dockerfile b/Dockerfile
index 9cceeab..df16d54 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,7 +7,7 @@ ENV CACHE_INVALIDATION=1
 ARG BUNDLER
 ARG RUBYGEMS
 RUN set -ex && echo "--- :ruby: Updating RubyGems and Bundler" \
-    && (gem update --system ${RUBYGEMS:-} || gem update --system 3.3.27) \
+    && (gem update --system ${RUBYGEMS:-} || gem update --system 3.4.22) \
     && ruby --version && gem --version && bundle --version \
     && codename="$(. /etc/os-release; x="${VERSION_CODENAME-${VERSION#*(}}"; echo "${x%%[ )]*}")" \
     && echo "--- :package: Installing system deps for debian '$codename'" \