diff --git a/pkgs/by-name/kn/knot-resolver_6/package.nix b/pkgs/by-name/kn/knot-resolver_6/package.nix
index f8058a3ad70e..715d78394d0d 100644
--- a/pkgs/by-name/kn/knot-resolver_6/package.nix
+++ b/pkgs/by-name/kn/knot-resolver_6/package.nix
@@ -36,11 +36,11 @@ let
   # TODO: we could cut the `let` short here, but it would de-indent everything.
   unwrapped = stdenv.mkDerivation (finalAttrs: {
     pname = "knot-resolver_6";
-    version = "6.4.0";
+    version = "6.4.1";
 
     src = fetchurl {
       url = "https://secure.nic.cz/files/knot-resolver/knot-resolver-${finalAttrs.version}.tar.xz";
-      hash = "sha256-T0v+CfjXOw7n1nDdHJD18qwOkGD5sUeDVfJvJzdGrIA=";
+      hash = "sha256-GqTClyHAm86amfPVZXIjEQNj1ms1ytSYm5Wyr9qTeag=";
     };
 
     outputs = [