diff --git a/pkgs/by-name/un/unicode-idna/package.nix b/pkgs/by-name/un/unicode-idna/package.nix
index a10c85849d5c..0f81cdfc380e 100644
--- a/pkgs/by-name/un/unicode-idna/package.nix
+++ b/pkgs/by-name/un/unicode-idna/package.nix
@@ -6,11 +6,11 @@
 
 stdenvNoCC.mkDerivation (finalAttrs: {
   pname = "unicode-idna";
-  version = "16.0.0";
+  version = "17.0.0";
 
   src = fetchurl {
-    url = "https://www.unicode.org/Public/idna/${finalAttrs.version}/IdnaMappingTable.txt";
-    hash = "sha256-bbLvTtNfOz3nTrwuAEBKlgf3bUmfV2uNQEPPFPHtF1w=";
+    url = "https://www.unicode.org/Public/${finalAttrs.version}/idna/IdnaMappingTable.txt";
+    hash = "sha256-h/BVBdwCb9sr/xYTK9xoqAFGdYNogqmisYRFQK0744I=";
   };
 
   dontUnpack = true;