diff --git a/pkgs/development/libraries/ntl/default.nix b/pkgs/development/libraries/ntl/default.nix
index 6e41639d48e5..f204ae68fb52 100644
--- a/pkgs/development/libraries/ntl/default.nix
+++ b/pkgs/development/libraries/ntl/default.nix
@@ -14,11 +14,11 @@ assert withGf2x -> gf2x != null;
 
 stdenv.mkDerivation rec {
   pname = "ntl";
-  version = "11.4.4";
+  version = "11.5.1";
 
   src = fetchurl {
     url = "http://www.shoup.net/ntl/ntl-${version}.tar.gz";
-    sha256 = "sha256-nX9uguEaQJ8VHA3i3rCMDXY7r5g0/d/UMr89IY+AIds=";
+    sha256 = "sha256-IQ0GwxMGy8bq9oFEU8Vsd22djo3zbXTrMG9qUj0caoo=";
   };
 
   buildInputs = [