diff --git a/pkgs/servers/dns/knot-dns/default.nix b/pkgs/servers/dns/knot-dns/default.nix
index fd5e79b6efb8..9ef49309dbb7 100644
--- a/pkgs/servers/dns/knot-dns/default.nix
+++ b/pkgs/servers/dns/knot-dns/default.nix
@@ -7,11 +7,11 @@ let inherit (stdenv.lib) optional optionals; in
 # Note: ATM only the libraries have been tested in nixpkgs.
 stdenv.mkDerivation rec {
   name = "knot-dns-${version}";
-  version = "2.8.0";
+  version = "2.8.1";
 
   src = fetchurl {
     url = "https://secure.nic.cz/files/knot-dns/knot-${version}.tar.xz";
-    sha256 = "494ad926705018bd754d96711dc2129f3173f326a0b57d33978090ba4eef87ef";
+    sha256 = "b21bf03e5cb6804df4e0e8b3898446349e86ddae5bf110edaf240d0ad1e2a2c6";
   };
 
   outputs = [ "bin" "out" "dev" ];