diff --git a/2.5-rc/alpine3.6/Dockerfile b/2.5-rc/alpine3.6/Dockerfile
index da5ad658c..f3c061cb5 100644
--- a/2.5-rc/alpine3.6/Dockerfile
+++ b/2.5-rc/alpine3.6/Dockerfile
@@ -10,7 +10,7 @@ RUN mkdir -p /usr/local/etc \
 ENV RUBY_MAJOR 2.5-rc
 ENV RUBY_VERSION 2.5.0-preview1
 ENV RUBY_DOWNLOAD_SHA256 c2f518eb04b38bdd562ba5611abd2521248a1608fc466368563dd794ddeddd09
-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/2.5-rc/stretch/Dockerfile b/2.5-rc/stretch/Dockerfile
index baea37607..33ce83d85 100644
--- a/2.5-rc/stretch/Dockerfile
+++ b/2.5-rc/stretch/Dockerfile
@@ -10,7 +10,7 @@ RUN mkdir -p /usr/local/etc \
 ENV RUBY_MAJOR 2.5-rc
 ENV RUBY_VERSION 2.5.0-preview1
 ENV RUBY_DOWNLOAD_SHA256 c2f518eb04b38bdd562ba5611abd2521248a1608fc466368563dd794ddeddd09
-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/2.5-rc/stretch/slim/Dockerfile b/2.5-rc/stretch/slim/Dockerfile
index bc2279a1d..c305ca107 100644
--- a/2.5-rc/stretch/slim/Dockerfile
+++ b/2.5-rc/stretch/slim/Dockerfile
@@ -22,7 +22,7 @@ RUN mkdir -p /usr/local/etc \
 ENV RUBY_MAJOR 2.5-rc
 ENV RUBY_VERSION 2.5.0-preview1
 ENV RUBY_DOWNLOAD_SHA256 c2f518eb04b38bdd562ba5611abd2521248a1608fc466368563dd794ddeddd09
-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