diff --git a/pkgs/os-specific/linux/kernel/linux-3.18.nix b/pkgs/os-specific/linux/kernel/linux-3.18.nix
index 0b9e5fa2e70..93ddecbf4a5 100644
--- a/pkgs/os-specific/linux/kernel/linux-3.18.nix
+++ b/pkgs/os-specific/linux/kernel/linux-3.18.nix
@@ -1,13 +1,13 @@
 { stdenv, fetchurl, ... } @ args:
 
 import ./generic.nix (args // rec {
-  version = "3.18.8";
+  version = "3.18.9";
   # Remember to update grsecurity!
   extraMeta.branch = "3.18";
 
   src = fetchurl {
     url = "mirror://kernel/linux/kernel/v3.x/linux-${version}.tar.xz";
-    sha256 = "1nxa0iq3v2jrjk9jy2pjcff40ragd4zxfpizi58pkcpj0gadkyww";
+    sha256 = "00cm64s17d03rlzkgqs0fq91vm95csfa2xw4zhp7y0md9fd73dxi";
   };
 
   features.iwlwifi = true;
diff --git a/pkgs/os-specific/linux/kernel/patches.nix b/pkgs/os-specific/linux/kernel/patches.nix
index a7f9f16d171..bcfbeb57ac2 100644
--- a/pkgs/os-specific/linux/kernel/patches.nix
+++ b/pkgs/os-specific/linux/kernel/patches.nix
@@ -72,10 +72,10 @@ rec {
     };
 
   grsecurity_unstable = grsecPatch
-    { kversion  = "3.18.8";
-      revision  = "201502271843";
+    { kversion  = "3.18.9";
+      revision  = "201503071142";
       branch    = "test";
-      sha256    = "0kj05imdll2j4lncdwc9r6fljad6aqa4s5k5dkh26gdcncjslkch";
+      sha256    = "0acrz6v827y8pdrl26wb652hmq0qglkwdgq0ffrw6k052f5lpfx2";
     };
 
   grsec_fix_path =