diff --git a/pkgs/development/libraries/x264/default.nix b/pkgs/development/libraries/x264/default.nix
index bf32969836ca..06ed123c7356 100644
--- a/pkgs/development/libraries/x264/default.nix
+++ b/pkgs/development/libraries/x264/default.nix
@@ -1,12 +1,12 @@
 {stdenv, fetchurl, yasm, enable10bit ? false}:
 
 stdenv.mkDerivation rec {
-  version = "20160615-2245";
+  version = "20170731-2245";
   name = "x264-${version}";
 
   src = fetchurl {
     url = "http://download.videolan.org/x264/snapshots/x264-snapshot-${version}-stable.tar.bz2";
-    sha256 = "0w5l77gm8bsmafzimzyc5s27kcw79r6nai3bpccqy0spyxhjsdc2";
+    sha256 = "01sgk1ps4qfifdnblwa3fxnd8ah6n6zbmfc1sy09cgqcdgzxgj0z";
   };
 
   patchPhase = ''