diff --git a/pkgs/development/libraries/nspr/default.nix b/pkgs/development/libraries/nspr/default.nix
index 17805f32afb..ce18498ee85 100644
--- a/pkgs/development/libraries/nspr/default.nix
+++ b/pkgs/development/libraries/nspr/default.nix
@@ -1,14 +1,14 @@
 { stdenv, fetchurl
 , CoreServices ? null }:
 
-let version = "4.18"; in
+let version = "4.19"; in
 
 stdenv.mkDerivation {
   name = "nspr-${version}";
 
   src = fetchurl {
     url = "mirror://mozilla/nspr/releases/v${version}/src/nspr-${version}.tar.gz";
-    sha256 = "0d7vr3wrgp73qbywrvdkikk8vq1s1n9vhf62db80g1zqkg05g5mq";
+    sha256 = "0agpv3f17h8kmzi0ifibaaxc1k3xc0q61wqw3l6r2xr2z8bmkn9f";
   };
 
   outputs = [ "out" "dev" ];
diff --git a/pkgs/development/libraries/nss/default.nix b/pkgs/development/libraries/nss/default.nix
index 8662b956ce2..840b349035b 100644
--- a/pkgs/development/libraries/nss/default.nix
+++ b/pkgs/development/libraries/nss/default.nix
@@ -15,11 +15,11 @@ let
 
 in stdenv.mkDerivation rec {
   name = "nss-${version}";
-  version = "3.35";
+  version = "3.36.1";
 
   src = fetchurl {
-    url = "mirror://mozilla/security/nss/releases/NSS_3_35_RTM/src/${name}.tar.gz";
-    sha256 = "1ypn68z9ncbbshi3184ywrhx5i846lyd72gps1grzqzdkgh7s4pl";
+    url = "mirror://mozilla/security/nss/releases/NSS_3_36_1_RTM/src/${name}.tar.gz";
+    sha256 = "1zrb49mp7cy3snnday1zv8d76h1mgppbcwxnlkqsgxlga8fl89b0";
   };
 
   buildInputs = [ perl zlib sqlite ]