diff --git a/pkgs/development/interpreters/ruby/default.nix b/pkgs/development/interpreters/ruby/default.nix
index b4cd9f3f4180..2e7d7f97819a 100644
--- a/pkgs/development/interpreters/ruby/default.nix
+++ b/pkgs/development/interpreters/ruby/default.nix
@@ -204,11 +204,11 @@ in {
     };
   };
 
-  ruby_2_3_4 = generic {
-    version = rubyVersion "2" "3" "4" "";
+  ruby_2_3_5 = generic {
+    version = rubyVersion "2" "3" "5" "";
     sha256 = {
-      src = "1hy0zr4vwkqcjbykh2hp0d6ifkrhgskaxlzy6878sc9kr4bqzqcq";
-      git = "0jjhgdjv3aayxb0flxjiny7xfzh3ggrqcpvgjv2ydm25padfbqmp";
+      src = "1k6x4g68lq30i0myip5bn56rcbwjxmqq95j1fkdgbvwbnaxzfqjl";
+      git = "0spwqz4b5xxqzs13azsd4xz4jkc3is7d9q4s6s2qilb8ib4863jl";
     };
   };
 
diff --git a/pkgs/development/interpreters/ruby/patchsets.nix b/pkgs/development/interpreters/ruby/patchsets.nix
index cdf1bf26717f..5bc1b858425b 100644
--- a/pkgs/development/interpreters/ruby/patchsets.nix
+++ b/pkgs/development/interpreters/ruby/patchsets.nix
@@ -29,7 +29,7 @@ rec {
     "${patchSet}/patches/ruby/2.2/head/railsexpress/02-improve-gc-stats.patch"
     "${patchSet}/patches/ruby/2.2/head/railsexpress/03-display-more-detailed-stack-trace.patch"
   ];
-  "2.3.4" = ops useRailsExpress [
+  "2.3.5" = ops useRailsExpress [
     "${patchSet}/patches/ruby/2.3/head/railsexpress/01-skip-broken-tests.patch"
     "${patchSet}/patches/ruby/2.3/head/railsexpress/02-improve-gc-stats.patch"
     "${patchSet}/patches/ruby/2.3/head/railsexpress/03-display-more-detailed-stack-trace.patch"
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index da57a8eda064..3da3be23d88b 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -6656,7 +6656,7 @@ with pkgs;
     ruby_2_0_0
     ruby_2_1_10
     ruby_2_2_7
-    ruby_2_3_4
+    ruby_2_3_5
     ruby_2_4_2;
 
   # Ruby aliases
@@ -6664,7 +6664,7 @@ with pkgs;
   ruby_2_0 = ruby_2_0_0;
   ruby_2_1 = ruby_2_1_10;
   ruby_2_2 = ruby_2_2_7;
-  ruby_2_3 = ruby_2_3_4;
+  ruby_2_3 = ruby_2_3_5;
   ruby_2_4 = ruby_2_4_2;
 
   scsh = callPackage ../development/interpreters/scsh { };