diff --git a/pkgs/development/interpreters/ruby/default.nix b/pkgs/development/interpreters/ruby/default.nix
index 6818a727155..906328eb458 100644
--- a/pkgs/development/interpreters/ruby/default.nix
+++ b/pkgs/development/interpreters/ruby/default.nix
@@ -204,11 +204,11 @@ in {
     };
   };
 
-  ruby_2_3_3 = generic {
-    version = rubyVersion "2" "3" "3" "";
+  ruby_2_3_4 = generic {
+    version = rubyVersion "2" "3" "4" "";
     sha256 = {
-      src = "1dqmh42p6siv9aqzdjldsnhljj3f2h30m0v8cf25icjmqp40h514";
-      git = "0cwjf0nrzaa5g81bw0qp65byyadhxvbnvprkshv3ckjl7yi46zf6";
+      src = "1hy0zr4vwkqcjbykh2hp0d6ifkrhgskaxlzy6878sc9kr4bqzqcq";
+      git = "0jjhgdjv3aayxb0flxjiny7xfzh3ggrqcpvgjv2ydm25padfbqmp";
     };
   };
 
diff --git a/pkgs/development/interpreters/ruby/patchsets.nix b/pkgs/development/interpreters/ruby/patchsets.nix
index f8326ed325c..b67c102628a 100644
--- a/pkgs/development/interpreters/ruby/patchsets.nix
+++ b/pkgs/development/interpreters/ruby/patchsets.nix
@@ -29,12 +29,7 @@ rec {
     "${patchSet}/patches/ruby/2.2.5/railsexpress/02-improve-gc-stats.patch"
     "${patchSet}/patches/ruby/2.2.5/railsexpress/03-display-more-detailed-stack-trace.patch"
   ];
-  "2.3.1" = 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"
-    "${patchSet}/patches/ruby/2.3/head/railsexpress/03-display-more-detailed-stack-trace.patch"
-  ];
-  "2.3.3" = ops useRailsExpress [
+  "2.3.4" = ops useRailsExpress [
     "${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 19a0c5cef0f..00fa8b5dbc0 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -6083,7 +6083,7 @@ with pkgs;
     ruby_2_0_0
     ruby_2_1_10
     ruby_2_2_5
-    ruby_2_3_3
+    ruby_2_3_4
     ruby_2_4_1;
 
   # Ruby aliases
@@ -6091,7 +6091,7 @@ with pkgs;
   ruby_2_0 = ruby_2_0_0;
   ruby_2_1 = ruby_2_1_10;
   ruby_2_2 = ruby_2_2_5;
-  ruby_2_3 = ruby_2_3_3;
+  ruby_2_3 = ruby_2_3_4;
   ruby_2_4 = ruby_2_4_1;
 
   scsh = callPackage ../development/interpreters/scsh { };