diff --git a/pkgs/os-specific/linux/kernel/linux-grsecurity.nix b/pkgs/os-specific/linux/kernel/linux-grsecurity.nix
index ad26b399a94b..859385c4e994 100644
--- a/pkgs/os-specific/linux/kernel/linux-grsecurity.nix
+++ b/pkgs/os-specific/linux/kernel/linux-grsecurity.nix
@@ -1,12 +1,12 @@
 { stdenv, fetchurl, perl, buildLinux, ... } @ args:
 
 import ./generic.nix (args // rec {
-  version = "4.9.12";
+  version = "4.9.13";
   extraMeta.branch = "4.9";
 
   src = fetchurl {
     url = "mirror://kernel/linux/kernel/v4.x/linux-${version}.tar.xz";
-    sha512 = "37riipfdm8xw53598w15l3x0gy06rmp22j1yf5wql2d1fzhgf29x007axdi7swq4jnpihd934mvpfb1sy42srkinps0x5gvv65n00bs";
+    sha512 = "2mszr7n212ryaw5q2lj92766aqnjznkfr7ly04g2ggzk7cyiirrf1w37d9arzg3smn5695fb1frikacnbrmz2hsaia48kjhwgjbxn2h";
   };
 
   kernelPatches = args.kernelPatches;
diff --git a/pkgs/os-specific/linux/kernel/patches.nix b/pkgs/os-specific/linux/kernel/patches.nix
index 8ea41ff59372..a61a6c9e18aa 100644
--- a/pkgs/os-specific/linux/kernel/patches.nix
+++ b/pkgs/os-specific/linux/kernel/patches.nix
@@ -95,9 +95,9 @@ rec {
   };
 
   grsecurity_testing = grsecPatch
-    { kver   = "4.9.12";
-      grrev  = "201702231830";
-      sha512 = "1455wpdy5lizdibs86llaxf087vggl921dn83pf4cnc9fbzc5mwa46vazahv9g8467bb335vgg5fcba2i0026s1h9vcsvyy6470m4i3";
+    { kver   = "4.9.13";
+      grrev  = "201702261126";
+      sha512 = "18snigndkyw372mp65v3sp9cpz8w4n3d3lzls50a3gl1qgnpp65g0vbf7vsm3spr9a5p5f17n7hl7lxgm0pqnjcgg0xr5ghkwx20z6b";
     };
 
   # This patch relaxes grsec constraints on the location of usermode helpers,