diff --git a/pkgs/os-specific/linux/rtl8821cu/default.nix b/pkgs/os-specific/linux/rtl8821cu/default.nix
index e45c70993a6d..35dbd1a9ee10 100644
--- a/pkgs/os-specific/linux/rtl8821cu/default.nix
+++ b/pkgs/os-specific/linux/rtl8821cu/default.nix
@@ -1,13 +1,13 @@
 { stdenv, fetchFromGitHub, kernel, bc }:
 stdenv.mkDerivation rec {
   name = "rtl8821cu-${kernel.version}-${version}";
-  version = "unstable-2020-08-21";
+  version = "unstable-2020-12-21";
 
   src = fetchFromGitHub {
     owner = "brektrou";
     repo = "rtl8821cu";
-    rev = "45a8b4393e3281b969822c81bd93bdb731d58472";
-    sha256 = "1995zs1hvlxjhbh2w7zkwr824z19cgc91s00g7yhm5d7zjav14rd";
+    rev = "428a0820487418ec69c0edb91726d1cf19763b1e";
+    sha256 = "1ccl94727yq7gzn37ky91k0736cambgnkaa37r2f2hinpl9qdd8q";
   };
 
   hardeningDisable = [ "pic" ];