diff --git a/pkgs/development/interpreters/ruby/default.nix b/pkgs/development/interpreters/ruby/default.nix
index 256d71fb5f0c..2a7115fd27df 100644
--- a/pkgs/development/interpreters/ruby/default.nix
+++ b/pkgs/development/interpreters/ruby/default.nix
@@ -6,6 +6,7 @@
 , makeBinaryWrapper, buildRubyGem, defaultGemConfig, removeReferencesTo
 , openssl
 , linuxPackages, libsystemtap
+, gitUpdater
 } @ args:
 
 let
@@ -13,7 +14,7 @@ let
   ops = lib.optionals;
   opString = lib.optionalString;
   config = import ./config.nix { inherit fetchFromSavannah; };
-  rubygems = import ./rubygems { inherit stdenv lib fetchurl; };
+  rubygems = import ./rubygems { inherit stdenv lib fetchurl gitUpdater; };
 
   # Contains the ruby version heuristics
   rubyVersion = import ./ruby-version.nix { inherit lib; };
@@ -57,6 +58,7 @@ let
           rubygemsSupport = false;
         }
       , useBaseRuby ? stdenv.hostPlatform != stdenv.buildPlatform
+      , gitUpdater
       }:
       stdenv.mkDerivation ( finalAttrs: {
         pname = "ruby";
diff --git a/pkgs/development/interpreters/ruby/rubygems/default.nix b/pkgs/development/interpreters/ruby/rubygems/default.nix
index 9ad7a04eab06..b7b3f8814252 100644
--- a/pkgs/development/interpreters/ruby/rubygems/default.nix
+++ b/pkgs/development/interpreters/ruby/rubygems/default.nix
@@ -1,12 +1,17 @@
-{ stdenv, lib, fetchurl }:
+{
+  fetchurl,
+  gitUpdater,
+  lib,
+  stdenv,
+}:
 
 stdenv.mkDerivation rec {
   pname = "rubygems";
-  version = "3.5.11";
+  version = "3.5.15";
 
   src = fetchurl {
     url = "https://rubygems.org/rubygems/rubygems-${version}.tgz";
-    hash = "sha256-RSG1L4Q2IKn8XKdBRSa3RjsJiVZMOugLJraPvRMEyBg=";
+    hash = "sha256-0Ibhw2j9PL4Eyg8QhFnQFC0NV0E66eHS/0siDryOa4c=";
   };
 
   patches = [
@@ -21,6 +26,12 @@ stdenv.mkDerivation rec {
     runHook postInstall
   '';
 
+  passthru.updateScript = gitUpdater {
+    url = "https://github.com/rubygems/rubygems.git";
+    rev-prefix = "v";
+    ignoredVersions = "(pre|alpha|beta|rc|bundler).*";
+  };
+
   meta = with lib; {
     description = "Package management framework for Ruby";
     changelog = "https://github.com/rubygems/rubygems/blob/v${version}/CHANGELOG.md";
diff --git a/pkgs/development/ruby-modules/bundler/default.nix b/pkgs/development/ruby-modules/bundler/default.nix
index 581c2544a220..de08320066e6 100644
--- a/pkgs/development/ruby-modules/bundler/default.nix
+++ b/pkgs/development/ruby-modules/bundler/default.nix
@@ -4,8 +4,8 @@ buildRubyGem rec {
   inherit ruby;
   name = "${gemName}-${version}";
   gemName = "bundler";
-  version = "2.5.11";
-  source.sha256 = "sha256-3XhL/lODSzmlbmQtvG4eyhmi5kVOTVOZTLcpgAWsTC4=";
+  version = "2.5.15";
+  source.sha256 = "sha256-YUKA8DH/jZrewERrXK/aAQOiSGUg1Vb5/BTRh2LEhhM=";
   dontPatchShebangs = true;
 
   postFixup = ''