diff --git a/pkgs/applications/misc/cortex/default.nix b/pkgs/applications/misc/cortex/default.nix
index 777a759177c..42565ae7fa8 100644
--- a/pkgs/applications/misc/cortex/default.nix
+++ b/pkgs/applications/misc/cortex/default.nix
@@ -1,12 +1,12 @@
 { stdenv, fetchgit, python3 }:
 
 stdenv.mkDerivation {
-  name = "cortex-2014-08-01";
+  name = "cortex-2015-08-23";
 
   src = fetchgit {
     url = "https://github.com/gglucas/cortex";
-    rev = "e749de6c21aae02386f006fd0401d22b9dcca424";
-    sha256 = "d5d59c5257107344122c701eb370f3740f9957b6b898ac798d797a4f152f614c";
+    rev = "ff10ff860479fe2f50590c0f8fcfc6dc34446639";
+    sha256 = "0pa2kkkcnmf56d5d5kknv0gfahddym75xripd4kgszaj6hsib3zg";
   };
 
   buildInputs = [ stdenv python3 ];