diff --git a/pkgs/development/tools/continuous-integration/jenkins/default.nix b/pkgs/development/tools/continuous-integration/jenkins/default.nix
index dc4eaaa8b3e..edc551a7054 100644
--- a/pkgs/development/tools/continuous-integration/jenkins/default.nix
+++ b/pkgs/development/tools/continuous-integration/jenkins/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "jenkins-${version}";
-  version = "1.637";
+  version = "1.638";
 
   src = fetchurl {
     url = "http://mirrors.jenkins-ci.org/war/${version}/jenkins.war";
-    sha256 = "12d231gbr56gwnq34h8jzchln01gq3mx37s9f91ri0k6damsaafb";
+    sha256 = "1kbx9n2hj8znw0ykvgvrlf2v472f1nkdwix6a2v4rjxkgmghxmh8";
   };
   meta = with stdenv.lib; {
     description = "An extendable open source continuous integration server";