diff --git a/2.5/alpine3.7/Dockerfile b/2.5/alpine3.7/Dockerfile
index dd37d533b..71725f3db 100644
--- a/2.5/alpine3.7/Dockerfile
+++ b/2.5/alpine3.7/Dockerfile
@@ -10,7 +10,7 @@ RUN mkdir -p /usr/local/etc \
 ENV RUBY_MAJOR 2.5
 ENV RUBY_VERSION 2.5.1
 ENV RUBY_DOWNLOAD_SHA256 886ac5eed41e3b5fc699be837b0087a6a5a3d10f464087560d2d21b3e71b754d
-ENV RUBYGEMS_VERSION 2.7.6
+ENV RUBYGEMS_VERSION 2.7.7
 ENV BUNDLER_VERSION 1.16.2
 
 # some of ruby's build scripts are written in ruby
diff --git a/2.5/stretch/Dockerfile b/2.5/stretch/Dockerfile
index fffc4a62e..c654d97eb 100644
--- a/2.5/stretch/Dockerfile
+++ b/2.5/stretch/Dockerfile
@@ -10,7 +10,7 @@ RUN mkdir -p /usr/local/etc \
 ENV RUBY_MAJOR 2.5
 ENV RUBY_VERSION 2.5.1
 ENV RUBY_DOWNLOAD_SHA256 886ac5eed41e3b5fc699be837b0087a6a5a3d10f464087560d2d21b3e71b754d
-ENV RUBYGEMS_VERSION 2.7.6
+ENV RUBYGEMS_VERSION 2.7.7
 ENV BUNDLER_VERSION 1.16.2
 
 # some of ruby's build scripts are written in ruby
diff --git a/2.5/stretch/slim/Dockerfile b/2.5/stretch/slim/Dockerfile
index 4bb770024..c80c031db 100644
--- a/2.5/stretch/slim/Dockerfile
+++ b/2.5/stretch/slim/Dockerfile
@@ -22,7 +22,7 @@ RUN mkdir -p /usr/local/etc \
 ENV RUBY_MAJOR 2.5
 ENV RUBY_VERSION 2.5.1
 ENV RUBY_DOWNLOAD_SHA256 886ac5eed41e3b5fc699be837b0087a6a5a3d10f464087560d2d21b3e71b754d
-ENV RUBYGEMS_VERSION 2.7.6
+ENV RUBYGEMS_VERSION 2.7.7
 ENV BUNDLER_VERSION 1.16.2
 
 # some of ruby's build scripts are written in ruby