diff --git a/pkgs/development/ocaml-modules/dns/default.nix b/pkgs/development/ocaml-modules/dns/default.nix
index 21d9d02da4b..4f0b95da6cb 100644
--- a/pkgs/development/ocaml-modules/dns/default.nix
+++ b/pkgs/development/ocaml-modules/dns/default.nix
@@ -4,14 +4,14 @@
 
 buildDunePackage rec {
   pname = "dns";
-  version = "4.6.2";
+  version = "4.6.3";
 
   useDune2 = true;
   minimumOCamlVersion = "4.07";
 
   src = fetchurl {
     url = "https://github.com/mirage/ocaml-dns/releases/download/v${version}/dns-v${version}.tbz";
-    sha256 = "0prypr5c589vay4alri78g0sarh06z35did26wn3s3di17d5761q";
+    sha256 = "0g7xw43jm5hv0w9lsnhhi0w3243mxl615cdsvz29yh39fcqvqsdy";
   };
 
   propagatedBuildInputs = [ rresult astring fmt logs ptime domain-name gmap cstruct ipaddr lru duration metrics ];