diff --git a/pkgs/development/libraries/webkit/src-for-default.nix b/pkgs/development/libraries/webkit/src-for-default.nix
index d67d065382b..26c5303fea1 100644
--- a/pkgs/development/libraries/webkit/src-for-default.nix
+++ b/pkgs/development/libraries/webkit/src-for-default.nix
@@ -1,9 +1,9 @@
 rec {
-   version="r49957";
-   name="webkit-r49957";
-   hash="0nq6hyzxx7xyi85200yb2dgvfz2lrkwl1fxyiaic27f4b9mmdp1c";
-   url="http://builds.nightly.webkit.org/files/trunk/src/WebKit-r49957.tar.bz2";
-   advertisedUrl="http://builds.nightly.webkit.org/files/trunk/src/WebKit-r49957.tar.bz2";
+   version="r50540";
+   name="webkit-r50540";
+   hash="07gjazgkjnvigkl7pa9r8hzw74dkx9m7m7q2xfnayp9lv79r2wp4";
+   url="http://builds.nightly.webkit.org/files/trunk/src/WebKit-r50540.tar.bz2";
+   advertisedUrl="http://builds.nightly.webkit.org/files/trunk/src/WebKit-r50540.tar.bz2";
   
   
 }