diff --git a/pkgs/by-name/wh/whois/package.nix b/pkgs/by-name/wh/whois/package.nix
index c95394a97f82..4503732b8681 100644
--- a/pkgs/by-name/wh/whois/package.nix
+++ b/pkgs/by-name/wh/whois/package.nix
@@ -11,14 +11,14 @@
 }:
 
 stdenv.mkDerivation (finalAttrs: {
-  version = "5.6.5";
+  version = "5.6.6";
   pname = "whois";
 
   src = fetchFromGitHub {
     owner = "rfc1036";
     repo = "whois";
     rev = "v${finalAttrs.version}";
-    hash = "sha256-zCaM3fMittoEzuMRELqc1ES8QPgZRXVjyHUfMsS5tJA=";
+    hash = "sha256-RKiXQJoyy3wd/KXphhgjikdmIHl8nmjEzibjk5FKpBQ=";
   };
 
   patches = [