diff --git a/2.3/alpine3.4/Dockerfile b/2.3/alpine3.4/Dockerfile
index 8a0b6df2a..209629793 100644
--- a/2.3/alpine3.4/Dockerfile
+++ b/2.3/alpine3.4/Dockerfile
@@ -8,8 +8,8 @@ RUN mkdir -p /usr/local/etc \
 	} >> /usr/local/etc/gemrc
 
 ENV RUBY_MAJOR 2.3
-ENV RUBY_VERSION 2.3.4
-ENV RUBY_DOWNLOAD_SHA256 341cd9032e9fd17c452ed8562a8d43f7e45bfe05e411d0d7d627751dd82c578c
+ENV RUBY_VERSION 2.3.5
+ENV RUBY_DOWNLOAD_SHA256 7d3a7dabb190c2da06c963063342ca9a214bcd26f2158e904f0ec059b065ffda
 ENV RUBYGEMS_VERSION 2.6.13
 
 # some of ruby's build scripts are written in ruby
diff --git a/2.3/jessie/Dockerfile b/2.3/jessie/Dockerfile
index ce279b65d..f1ff724e2 100644
--- a/2.3/jessie/Dockerfile
+++ b/2.3/jessie/Dockerfile
@@ -8,8 +8,8 @@ RUN mkdir -p /usr/local/etc \
 	} >> /usr/local/etc/gemrc
 
 ENV RUBY_MAJOR 2.3
-ENV RUBY_VERSION 2.3.4
-ENV RUBY_DOWNLOAD_SHA256 341cd9032e9fd17c452ed8562a8d43f7e45bfe05e411d0d7d627751dd82c578c
+ENV RUBY_VERSION 2.3.5
+ENV RUBY_DOWNLOAD_SHA256 7d3a7dabb190c2da06c963063342ca9a214bcd26f2158e904f0ec059b065ffda
 ENV RUBYGEMS_VERSION 2.6.13
 
 # 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 3b1b3bef7..1882fb536 100644
--- a/2.3/jessie/slim/Dockerfile
+++ b/2.3/jessie/slim/Dockerfile
@@ -20,8 +20,8 @@ RUN mkdir -p /usr/local/etc \
 	} >> /usr/local/etc/gemrc
 
 ENV RUBY_MAJOR 2.3
-ENV RUBY_VERSION 2.3.4
-ENV RUBY_DOWNLOAD_SHA256 341cd9032e9fd17c452ed8562a8d43f7e45bfe05e411d0d7d627751dd82c578c
+ENV RUBY_VERSION 2.3.5
+ENV RUBY_DOWNLOAD_SHA256 7d3a7dabb190c2da06c963063342ca9a214bcd26f2158e904f0ec059b065ffda
 ENV RUBYGEMS_VERSION 2.6.13
 
 # some of ruby's build scripts are written in ruby