diff --git a/pkgs/development/libraries/haskell/dns/default.nix b/pkgs/development/libraries/haskell/dns/default.nix
index 0854f39efce..e6c18872ed3 100644
--- a/pkgs/development/libraries/haskell/dns/default.nix
+++ b/pkgs/development/libraries/haskell/dns/default.nix
@@ -1,15 +1,19 @@
 { cabal, attoparsec, attoparsecConduit, binary, blazeBuilder
-, conduit, iproute, mtl, network, networkConduit, random
+, conduit, hspec, iproute, mtl, network, networkConduit, random
 }:
 
 cabal.mkDerivation (self: {
   pname = "dns";
-  version = "0.3.6";
-  sha256 = "0dpwy94id9rxxjpji47nazinm8i1ihm0606dmi5iqqhbl5h2jara";
+  version = "0.3.7";
+  sha256 = "1wly3h36j9gjyx6p2vzand5019m6rs0qkcf1h4q61igks65xs674";
   buildDepends = [
     attoparsec attoparsecConduit binary blazeBuilder conduit iproute
     mtl network networkConduit random
   ];
+  testDepends = [
+    attoparsec attoparsecConduit binary blazeBuilder conduit hspec
+    iproute mtl network networkConduit random
+  ];
   meta = {
     description = "DNS library in Haskell";
     license = self.stdenv.lib.licenses.bsd3;