diff --git a/pkgs/os-specific/linux/kernel/linux-rt-6.6.nix b/pkgs/os-specific/linux/kernel/linux-rt-6.6.nix
index 8eab0d2b45f8..b313235ae5a2 100644
--- a/pkgs/os-specific/linux/kernel/linux-rt-6.6.nix
+++ b/pkgs/os-specific/linux/kernel/linux-rt-6.6.nix
@@ -6,7 +6,7 @@
 , ... } @ args:
 
 let
-  version = "6.6.36-rt35"; # updated by ./update-rt.sh
+  version = "6.6.40-rt36"; # updated by ./update-rt.sh
   branch = lib.versions.majorMinor version;
   kversion = builtins.elemAt (lib.splitString "-" version) 0;
 in buildLinux (args // {
@@ -19,14 +19,14 @@ in buildLinux (args // {
 
   src = fetchurl {
     url = "mirror://kernel/linux/kernel/v6.x/linux-${kversion}.tar.xz";
-    sha256 = "1mfdw2prjb54r19y22sm37q8spnk6lyk162ima7gps1pnwl6hrxr";
+    sha256 = "0f7mmw5pzd174376m7r928xbi9mdcla0vy6plq0xdf2mq01kqfjw";
   };
 
   kernelPatches = let rt-patch = {
     name = "rt";
     patch = fetchurl {
       url = "mirror://kernel/linux/kernel/projects/rt/${branch}/older/patch-${version}.patch.xz";
-      sha256 = "154wfx6aa9yxkavf05vka8spvx99pa4svq02b6kb1zfrq6r93bq6";
+      sha256 = "011ajsiqhd7i1b2pzn6gaihh483n3rzyg219qz6d17a069mv5lj2";
     };
   }; in [ rt-patch ] ++ kernelPatches;