diff --git a/pkgs/development/libraries/nspr/default.nix b/pkgs/development/libraries/nspr/default.nix
index 6ed8db7f10e7..88dc9ffe6966 100644
--- a/pkgs/development/libraries/nspr/default.nix
+++ b/pkgs/development/libraries/nspr/default.nix
@@ -1,13 +1,13 @@
-{stdenv, fetchurl}:
+{ stdenv, fetchurl }:
 
-let version = "4.8.3"; in
+let version = "4.8.4"; in
 
 stdenv.mkDerivation {
   name = "nspr-${version}";
 
   src = fetchurl {
     url = "http://ftp.mozilla.org/pub/mozilla.org/nspr/releases/v${version}/src/nspr-${version}.tar.gz";
-    sha256 = "1n7vyjj8x8qaqf59slnxngn47gl5wpiq420bnsyc55hava1qgzxp";
+    sha256 = "0ik73yimgfpj3lkqjnpf76b942j76i5yi1z8bn75dxxc08brl4cc";
   };
 
   preConfigure = "cd mozilla/nsprpub";
diff --git a/pkgs/development/libraries/nss/default.nix b/pkgs/development/libraries/nss/default.nix
index 473405c59516..a51c355b6448 100644
--- a/pkgs/development/libraries/nss/default.nix
+++ b/pkgs/development/libraries/nss/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, nspr, perl, zlib}:
+{ stdenv, fetchurl, nspr, perl, zlib }:
 
 let
 
@@ -10,11 +10,11 @@ let
 in
 
 stdenv.mkDerivation {
-  name = "nss-3.12.5";
+  name = "nss-3.12.6";
   
   src = fetchurl {
-    url = http://ftp.mozilla.org/pub/mozilla.org/security/nss/releases/NSS_3_12_5_RTM/src/nss-3.12.5.tar.gz;
-    sha1 = "ec12c6eddba5fb4609a174b079095b374935d37c";
+    url = http://ftp.mozilla.org/pub/mozilla.org/security/nss/releases/NSS_3_12_6_RTM/src/nss-3.12.6.tar.gz;
+    sha1 = "461e81adbdef6c3f848fcfee0dc5ad8c2dbebd46";
   };
 
   buildInputs = [nspr perl zlib];