diff --git a/pkgs/os-specific/linux/kernel/linux-4.4.nix b/pkgs/os-specific/linux/kernel/linux-4.4.nix
index 6043c8f0613..bb86b41fd21 100644
--- a/pkgs/os-specific/linux/kernel/linux-4.4.nix
+++ b/pkgs/os-specific/linux/kernel/linux-4.4.nix
@@ -1,12 +1,12 @@
 { stdenv, fetchurl, perl, buildLinux, ... } @ args:
 
 import ./generic.nix (args // rec {
-  version = "4.4.27";
+  version = "4.4.28";
   extraMeta.branch = "4.4";
 
   src = fetchurl {
     url = "mirror://kernel/linux/kernel/v4.x/linux-${version}.tar.xz";
-    sha256 = "1zbahhbwxdhl7v0l2ch1ybllywj2df3rmy8w451whr79z7c7shvc";
+    sha256 = "1z7ln5llv67n2y9k6ihy4l4zm03yabhma8xhc0psp4x8168wn6l4";
   };
 
   kernelPatches = args.kernelPatches;
diff --git a/pkgs/os-specific/linux/kernel/linux-4.8.nix b/pkgs/os-specific/linux/kernel/linux-4.8.nix
index 8c07fb7383d..0a2da165638 100644
--- a/pkgs/os-specific/linux/kernel/linux-4.8.nix
+++ b/pkgs/os-specific/linux/kernel/linux-4.8.nix
@@ -1,12 +1,12 @@
 { stdenv, fetchurl, perl, buildLinux, ... } @ args:
 
 import ./generic.nix (args // rec {
-  version = "4.8.4";
+  version = "4.8.5";
   extraMeta.branch = "4.8";
 
   src = fetchurl {
     url = "mirror://kernel/linux/kernel/v4.x/linux-${version}.tar.xz";
-    sha256 = "1c122kcd98ljk2f7w4qkbx4cjv7a50w4gdc9qrxkpciaj4yqvjy1";
+    sha256 = "0264h3b8h4bqgcif2jzbz4yzv290nrn444bhcqzb0lizj8a1f5s8";
   };
 
   kernelPatches = args.kernelPatches;
diff --git a/pkgs/os-specific/linux/kernel/linux-testing.nix b/pkgs/os-specific/linux/kernel/linux-testing.nix
index 38be5ec588d..39bfbe76e6c 100644
--- a/pkgs/os-specific/linux/kernel/linux-testing.nix
+++ b/pkgs/os-specific/linux/kernel/linux-testing.nix
@@ -1,13 +1,13 @@
 { stdenv, fetchurl, perl, buildLinux, ... } @ args:
 
 import ./generic.nix (args // rec {
-  version = "4.9-rc2";
-  modDirVersion = "4.9.0-rc2";
+  version = "4.9-rc3";
+  modDirVersion = "4.9.0-rc3";
   extraMeta.branch = "4.9";
 
   src = fetchurl {
     url = "mirror://kernel/linux/kernel/v4.x/testing/linux-${version}.tar.xz";
-    sha256 = "1hf913mgyz5niy971c505s8yhqrdvq65psdrjz7cxmdxsb96pk94";
+    sha256 = "16dvjxh1i0s18mzm2bcj1v1drv7n2id39jgy71n7i5pyvzc5ffhj";
   };
 
   features.iwlwifi = true;