diff --git a/2.3/Dockerfile b/2.3/Dockerfile
index 9f1137d63..3f3f7aa19 100644
--- a/2.3/Dockerfile
+++ b/2.3/Dockerfile
@@ -38,7 +38,7 @@ RUN set -ex \
 	&& gem update --system $RUBYGEMS_VERSION \
 	&& rm -r /usr/src/ruby
 
-ENV BUNDLER_VERSION 1.13.0
+ENV BUNDLER_VERSION 1.13.1
 
 RUN gem install bundler --version "$BUNDLER_VERSION"
 
diff --git a/2.3/alpine/Dockerfile b/2.3/alpine/Dockerfile
index 145c06dc3..2f5f16071 100644
--- a/2.3/alpine/Dockerfile
+++ b/2.3/alpine/Dockerfile
@@ -74,7 +74,7 @@ RUN set -ex \
 	&& gem update --system $RUBYGEMS_VERSION \
 	&& rm -r /usr/src/ruby
 
-ENV BUNDLER_VERSION 1.13.0
+ENV BUNDLER_VERSION 1.13.1
 
 RUN gem install bundler --version "$BUNDLER_VERSION"
 
diff --git a/2.3/slim/Dockerfile b/2.3/slim/Dockerfile
index cd253c8a0..78e7a46c9 100644
--- a/2.3/slim/Dockerfile
+++ b/2.3/slim/Dockerfile
@@ -60,7 +60,7 @@ RUN set -ex \
 	&& gem update --system $RUBYGEMS_VERSION \
 	&& rm -r /usr/src/ruby
 
-ENV BUNDLER_VERSION 1.13.0
+ENV BUNDLER_VERSION 1.13.1
 
 RUN gem install bundler --version "$BUNDLER_VERSION"