diff --git a/pkgs/os-specific/linux/gradm/default.nix b/pkgs/os-specific/linux/gradm/default.nix
index cdfc91a68372..7d2660ad26e9 100644
--- a/pkgs/os-specific/linux/gradm/default.nix
+++ b/pkgs/os-specific/linux/gradm/default.nix
@@ -5,11 +5,11 @@
 
 stdenv.mkDerivation rec {
   pname = "gradm";
-  version = "3.1-201903191516";
+  version = "3.1-202012071814";
 
   src  = fetchurl {
     url    = "http://grsecurity.net/stable/${pname}-${version}.tar.gz";
-    sha256 = "1wszqwaswcf08s9zbvnqzmmfdykyfcy16w8xjia20ypr7wwbd86k";
+    sha256 = "sha256-ghl9P2IYsSHcJsVxJbFwfFS1CTZ2xLxdvyhdk/1OZG4=";
   };
 
   nativeBuildInputs = [ bison flex ];