diff --git a/README.md b/README.md
index ae72562..0380316 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@ whatwg-url is a full implementation of the WHATWG [URL Standard](https://url.spe
 
 ## Current Status
 
-whatwg-url is currently up to date with the URL spec up to commit [9b2eb1](https://github.com/whatwg/url/commit/9b2eb10eb8436adaf6620b1864b25442152f205b).
+whatwg-url is currently up to date with the URL spec up to commit [f4d84a](https://github.com/whatwg/url/commit/f4d84a52e67b154b2d11e04889fe0a35a029c833).
 
 ## API
 
diff --git a/scripts/get-latest-platform-tests.js b/scripts/get-latest-platform-tests.js
index 6dc56b2..c1120a7 100644
--- a/scripts/get-latest-platform-tests.js
+++ b/scripts/get-latest-platform-tests.js
@@ -14,7 +14,7 @@ const request = require("request");
 // 1. Go to https://github.com/w3c/web-platform-tests/tree/master/url
 // 2. Press "y" on your keyboard to get a permalink
 // 3. Copy the commit hash
-const commitHash = "503f5b5f78ec4e87d144f78609f363f0ed0ea8db";
+const commitHash = "9e33ff697b9bb0b2b0c160ae34c145f9a78ae04d";
 
 const sourceURL = `https://raw.githubusercontent.com/w3c/web-platform-tests/${commitHash}/url/urltestdata.json`;
 const setterSourceURL = `https://raw.githubusercontent.com/w3c/web-platform-tests/${commitHash}/url/setters_tests.json`;
diff --git a/src/url-state-machine.js b/src/url-state-machine.js
index 7d76b72..629cf7f 100644
--- a/src/url-state-machine.js
+++ b/src/url-state-machine.js
@@ -400,7 +400,7 @@ function parseHost(input, isSpecialArg) {
   }
 
   const domain = utf8PercentDecode(input);
-  const asciiDomain = tr46.toASCII(domain, false, tr46.PROCESSING_OPTIONS.TRANSITIONAL, false);
+  const asciiDomain = tr46.toASCII(domain, false, tr46.PROCESSING_OPTIONS.NONTRANSITIONAL, false);
   if (asciiDomain === null) {
     return failure;
   }