diff --git a/2.2/Dockerfile b/2.2/Dockerfile
index 4760b3a7d..a84fc3ad3 100644
--- a/2.2/Dockerfile
+++ b/2.2/Dockerfile
@@ -59,7 +59,7 @@ RUN set -ex \
 	\
 	&& gem update --system "$RUBYGEMS_VERSION"
 
-ENV BUNDLER_VERSION 1.15.2
+ENV BUNDLER_VERSION 1.15.3
 
 RUN gem install bundler --version "$BUNDLER_VERSION"
 
diff --git a/2.2/alpine/Dockerfile b/2.2/alpine/Dockerfile
index b572b2c60..01428ed67 100644
--- a/2.2/alpine/Dockerfile
+++ b/2.2/alpine/Dockerfile
@@ -95,7 +95,7 @@ RUN set -ex \
 	\
 	&& gem update --system "$RUBYGEMS_VERSION"
 
-ENV BUNDLER_VERSION 1.15.2
+ENV BUNDLER_VERSION 1.15.3
 
 RUN gem install bundler --version "$BUNDLER_VERSION"
 
diff --git a/2.2/slim/Dockerfile b/2.2/slim/Dockerfile
index ab0234118..65d9fd3c4 100644
--- a/2.2/slim/Dockerfile
+++ b/2.2/slim/Dockerfile
@@ -82,7 +82,7 @@ RUN set -ex \
 	\
 	&& gem update --system "$RUBYGEMS_VERSION"
 
-ENV BUNDLER_VERSION 1.15.2
+ENV BUNDLER_VERSION 1.15.3
 
 RUN gem install bundler --version "$BUNDLER_VERSION"