diff --git a/test/Dockerfile.distro b/test/Dockerfile.distro
index bfb5a3d141..508dc1241b 100644
--- a/test/Dockerfile.distro
+++ b/test/Dockerfile.distro
@@ -216,7 +216,7 @@ FROM build AS test-ruby
 # renovate: datasource=github-releases packageName=containerbase/ruby-prebuild versioning=ruby
 RUN install-tool ruby 3.4.8
 # renovate: datasource=rubygems versioning=ruby
-RUN install-tool bundler 2.7.2
+RUN install-tool bundler 4.0.5
 # renovate: datasource=rubygems versioning=ruby
 RUN install-tool cocoapods 1.16.2
 
diff --git a/test/ruby/Dockerfile b/test/ruby/Dockerfile
index 1c6c38b679..9b46d7998b 100644
--- a/test/ruby/Dockerfile
+++ b/test/ruby/Dockerfile
@@ -74,7 +74,7 @@ FROM build AS test-bundler-c
 USER 12021
 
 # renovate: datasource=rubygems depName=bundler
-ENV BUNDLER_VERSION=2.7.2
+ENV BUNDLER_VERSION=4.0.5
 RUN install-tool bundler
 
 RUN set -ex; \
@@ -100,7 +100,7 @@ true
 FROM build AS test-bundler-d
 
 # renovate: datasource=rubygems depName=bundler
-ENV BUNDLER_VERSION=2.7.2
+ENV BUNDLER_VERSION=4.0.5
 RUN install-tool bundler
 
 RUN set -ex; ls -la /usr/local/bin/; [ $(stat --format '%u' "/usr/local/bin/bundler") -eq 12021 ]
@@ -111,7 +111,7 @@ USER 12021
 RUN install-tool ruby 3.4.0
 
 # renovate: datasource=rubygems depName=bundler
-ENV BUNDLER_VERSION=2.7.2
+ENV BUNDLER_VERSION=4.0.5
 RUN install-tool bundler
 
 
diff --git a/test/ruby/Dockerfile.arm64 b/test/ruby/Dockerfile.arm64
index d3337700fc..6ba30e816f 100644
--- a/test/ruby/Dockerfile.arm64
+++ b/test/ruby/Dockerfile.arm64
@@ -46,7 +46,7 @@ RUN install-tool ruby 3.4.8
 FROM test-ruby AS test-bundler
 
 # renovate: datasource=rubygems versioning=ruby
-RUN install-tool bundler 2.7.2
+RUN install-tool bundler 4.0.5
 
 #--------------------------------------
 # Image: cocoapods