diff --git a/pkgs/development/libraries/npth/default.nix b/pkgs/development/libraries/npth/default.nix
index 8ebf62cfdf0e..dc4f4926e9d5 100644
--- a/pkgs/development/libraries/npth/default.nix
+++ b/pkgs/development/libraries/npth/default.nix
@@ -1,11 +1,11 @@
 { stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
-  name = "npth-1.3";
+  name = "npth-1.5";
 
   src = fetchurl {
     url = "ftp://ftp.gnupg.org/gcrypt/npth/${name}.tar.bz2";
-    sha256 = "0am86vblapwz84254qpmhz0chk70g6qzh3wdxcs0gvba8d01ka5w";
+    sha256 = "1hmkkp6vzyrh8v01c2ynzf9vwikyagp7p1lxhbnr4ysk3w66jji9";
   };
 
   meta = with stdenv.lib; {