diff --git a/pkgs/applications/networking/browsers/chromium/default.nix b/pkgs/applications/networking/browsers/chromium/default.nix
index 087bde000ed..18fb7fefeff 100644
--- a/pkgs/applications/networking/browsers/chromium/default.nix
+++ b/pkgs/applications/networking/browsers/chromium/default.nix
@@ -90,7 +90,9 @@ let
   # user namespace sandbox patch
   userns_patch = if versionOlder sourceInfo.version "30.0.0.0"
                  then ./sandbox_userns_29.patch
-                 else ./sandbox_userns_30.patch;
+                 else if versionOlder sourceInfo.version "31.0.0.0"
+                 then ./sandbox_userns_30.patch
+                 else ./sandbox_userns_31.patch;
 
 in stdenv.mkDerivation rec {
   name = "${packageName}-${version}";
diff --git a/pkgs/applications/networking/browsers/chromium/sources.nix b/pkgs/applications/networking/browsers/chromium/sources.nix
index e83f9948535..79aa06192c5 100644
--- a/pkgs/applications/networking/browsers/chromium/sources.nix
+++ b/pkgs/applications/networking/browsers/chromium/sources.nix
@@ -1,14 +1,14 @@
 # This file is autogenerated from update.sh in the same directory.
 {
   dev = {
-    version = "31.0.1612.0";
-    url = "http://commondatastorage.googleapis.com/chromium-browser-official/chromium-31.0.1612.0.tar.xz";
-    sha256 = "19h6i8jdnpzbvyq8pk9jq89lghnydpij9yj8xfs7qdgqgyxxcl5w";
+    version = "31.0.1626.0";
+    url = "http://commondatastorage.googleapis.com/chromium-browser-official/chromium-31.0.1626.0.tar.xz";
+    sha256 = "15rbh8hjs9ipkl4c34701p1zpfmrsw6dya03a8ym5pa5dha949mp";
   };
   beta = {
-    version = "30.0.1599.22";
-    url = "http://commondatastorage.googleapis.com/chromium-browser-official/chromium-30.0.1599.22.tar.xz";
-    sha256 = "0955q7fz6nfr7nbxa8hp9q7mgljlan42rjg8ql5x2vn6c80sjji8";
+    version = "30.0.1599.37";
+    url = "http://commondatastorage.googleapis.com/chromium-browser-official/chromium-30.0.1599.37.tar.xz";
+    sha256 = "05xxafl1dgbi040zmhzi5v5m6myi7c6jgq2nrksmrx2i91kfir2k";
   };
   stable = {
     version = "29.0.1547.65";