diff --git a/2.3/alpine3.4/Dockerfile b/2.3/alpine3.4/Dockerfile
index b8df349cc..bb1edd450 100644
--- a/2.3/alpine3.4/Dockerfile
+++ b/2.3/alpine3.4/Dockerfile
@@ -10,7 +10,7 @@ RUN mkdir -p /usr/local/etc \
 ENV RUBY_MAJOR 2.3
 ENV RUBY_VERSION 2.3.5
 ENV RUBY_DOWNLOAD_SHA256 7d3a7dabb190c2da06c963063342ca9a214bcd26f2158e904f0ec059b065ffda
-ENV RUBYGEMS_VERSION 2.7.2
+ENV RUBYGEMS_VERSION 2.7.3
 ENV BUNDLER_VERSION 1.16.0
 
 # some of ruby's build scripts are written in ruby
diff --git a/2.3/jessie/Dockerfile b/2.3/jessie/Dockerfile
index 7e2f2f40d..02adf6c51 100644
--- a/2.3/jessie/Dockerfile
+++ b/2.3/jessie/Dockerfile
@@ -10,7 +10,7 @@ RUN mkdir -p /usr/local/etc \
 ENV RUBY_MAJOR 2.3
 ENV RUBY_VERSION 2.3.5
 ENV RUBY_DOWNLOAD_SHA256 7d3a7dabb190c2da06c963063342ca9a214bcd26f2158e904f0ec059b065ffda
-ENV RUBYGEMS_VERSION 2.7.2
+ENV RUBYGEMS_VERSION 2.7.3
 ENV BUNDLER_VERSION 1.16.0
 
 # some of ruby's build scripts are written in ruby
diff --git a/2.3/jessie/slim/Dockerfile b/2.3/jessie/slim/Dockerfile
index c28833ec4..294efc2b8 100644
--- a/2.3/jessie/slim/Dockerfile
+++ b/2.3/jessie/slim/Dockerfile
@@ -22,7 +22,7 @@ RUN mkdir -p /usr/local/etc \
 ENV RUBY_MAJOR 2.3
 ENV RUBY_VERSION 2.3.5
 ENV RUBY_DOWNLOAD_SHA256 7d3a7dabb190c2da06c963063342ca9a214bcd26f2158e904f0ec059b065ffda
-ENV RUBYGEMS_VERSION 2.7.2
+ENV RUBYGEMS_VERSION 2.7.3
 ENV BUNDLER_VERSION 1.16.0
 
 # some of ruby's build scripts are written in ruby