diff --git a/pkgs/development/ruby-modules/bundler/default.nix b/pkgs/development/ruby-modules/bundler/default.nix
index 718da20b006..50b8725a0af 100644
--- a/pkgs/development/ruby-modules/bundler/default.nix
+++ b/pkgs/development/ruby-modules/bundler/default.nix
@@ -4,7 +4,7 @@ buildRubyGem rec {
   inherit ruby;
   name = "${gemName}-${version}";
   gemName = "bundler";
-  version = "1.11.2";
-  sha256 = "0s37j1hyngc4shq0in8f9y1knjdqkisdg3dd1mfwgq7n1bz8zan7";
+  version = "1.12.5";
+  sha256 = "1q84xiwm9j771lpmiply0ls9l2bpvl5axn3jblxjvrldh8di2pkc";
   dontPatchShebangs = true;
 }