diff --git a/2.2/alpine3.4/Dockerfile b/2.2/alpine3.4/Dockerfile
index db5d2c7a3..5c019e558 100644
--- a/2.2/alpine3.4/Dockerfile
+++ b/2.2/alpine3.4/Dockerfile
@@ -8,8 +8,8 @@ RUN mkdir -p /usr/local/etc \
 	} >> /usr/local/etc/gemrc
 
 ENV RUBY_MAJOR 2.2
-ENV RUBY_VERSION 2.2.7
-ENV RUBY_DOWNLOAD_SHA256 234c8aee6543da9efd67008e6e7ee740d41ed57a52e797f65043c3b5ec3bcb53
+ENV RUBY_VERSION 2.2.8
+ENV RUBY_DOWNLOAD_SHA256 37eafc15037396c26870f6a6c5bcd0658d14b46cd5e191a3b56d89dd22d561b0
 ENV RUBYGEMS_VERSION 2.6.13
 
 # some of ruby's build scripts are written in ruby
diff --git a/2.2/jessie/Dockerfile b/2.2/jessie/Dockerfile
index edbc9a707..3c10c89a1 100644
--- a/2.2/jessie/Dockerfile
+++ b/2.2/jessie/Dockerfile
@@ -8,8 +8,8 @@ RUN mkdir -p /usr/local/etc \
 	} >> /usr/local/etc/gemrc
 
 ENV RUBY_MAJOR 2.2
-ENV RUBY_VERSION 2.2.7
-ENV RUBY_DOWNLOAD_SHA256 234c8aee6543da9efd67008e6e7ee740d41ed57a52e797f65043c3b5ec3bcb53
+ENV RUBY_VERSION 2.2.8
+ENV RUBY_DOWNLOAD_SHA256 37eafc15037396c26870f6a6c5bcd0658d14b46cd5e191a3b56d89dd22d561b0
 ENV RUBYGEMS_VERSION 2.6.13
 
 # some of ruby's build scripts are written in ruby
diff --git a/2.2/jessie/slim/Dockerfile b/2.2/jessie/slim/Dockerfile
index 71d144c12..7a120c40f 100644
--- a/2.2/jessie/slim/Dockerfile
+++ b/2.2/jessie/slim/Dockerfile
@@ -20,8 +20,8 @@ RUN mkdir -p /usr/local/etc \
 	} >> /usr/local/etc/gemrc
 
 ENV RUBY_MAJOR 2.2
-ENV RUBY_VERSION 2.2.7
-ENV RUBY_DOWNLOAD_SHA256 234c8aee6543da9efd67008e6e7ee740d41ed57a52e797f65043c3b5ec3bcb53
+ENV RUBY_VERSION 2.2.8
+ENV RUBY_DOWNLOAD_SHA256 37eafc15037396c26870f6a6c5bcd0658d14b46cd5e191a3b56d89dd22d561b0
 ENV RUBYGEMS_VERSION 2.6.13
 
 # some of ruby's build scripts are written in ruby