diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index 14cb544ac77f..72b80afebbb6 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -25,10 +25,10 @@ let self = _self // overrides; _self = with self; {
 
 
   ack = buildPerlPackage rec {
-    name = "ack-2.14";
+    name = "ack-2.16";
     src = fetchurl {
       url = "mirror://cpan/authors/id/P/PE/PETDANCE/${name}.tar.gz";
-      sha256 = "0gqv30666vlclnwylhk9i64s7raa70x4ncy6bg48s5gcxwrshjc5";
+      sha256 = "0ifbmbfvagfi76i7vjpggs2hrbqqisd14f5zizan6cbdn8dl5z2g";
     };
     outputs = ["out" "doc"];
     # use gnused so that the preCheck command passes