diff --git a/lib/bundled_gems.rb b/lib/bundled_gems.rb
index 6b8d7112c1..f201800cf6 100644
--- a/lib/bundled_gems.rb
+++ b/lib/bundled_gems.rb
@@ -10,18 +10,18 @@ module Gem::BUNDLED_GEMS
     "net-smtp" => "3.1.0",
     "prime" => "3.1.0",
     "abbrev" => "3.4.0",
-    "observer" => "3.4.0",
-    "getoptlong" => "3.4.0",
-    "resolv-replace" => "3.4.0",
-    "rinda" => "3.4.0",
-    "nkf" => "3.4.0",
-    "syslog" => "3.4.0",
-    "drb" => "3.4.0",
-    "mutex_m" => "3.4.0",
-    "csv" => "3.4.0",
     "base64" => "3.4.0",
     "bigdecimal" => "3.4.0",
+    "csv" => "3.4.0",
+    "drb" => "3.4.0",
+    "getoptlong" => "3.4.0",
+    "mutex_m" => "3.4.0",
+    "nkf" => "3.4.0",
+    "observer" => "3.4.0",
     "racc" => "3.4.0",
+    "resolv-replace" => "3.4.0",
+    "rinda" => "3.4.0",
+    "syslog" => "3.4.0",
   }.freeze
 
   EXACT = {