diff --git a/pkgs/os-specific/linux/kernel/linux-3.12.nix b/pkgs/os-specific/linux/kernel/linux-3.12.nix
index e14d722ad5df..48f12307bd15 100644
--- a/pkgs/os-specific/linux/kernel/linux-3.12.nix
+++ b/pkgs/os-specific/linux/kernel/linux-3.12.nix
@@ -1,12 +1,12 @@
 { stdenv, fetchurl, perl, buildLinux, ... } @ args:
 
 import ./generic.nix (args // rec {
-  version = "3.12.63";
+  version = "3.12.66";
   extraMeta.branch = "3.12";
 
   src = fetchurl {
     url = "mirror://kernel/linux/kernel/v3.x/linux-${version}.tar.xz";
-    sha256 = "0srg7xd68n10b28c3l5qa4dx5qr84ci7fdn48wcj79y7h2s0367x";
+    sha256 = "02nac7sr0c1h10mxp5azlsmz0gsr7qllsn2hibjknhk7jg8ry8cc";
   };
 
   kernelPatches = args.kernelPatches;