diff --git a/dist/query.js b/dist/query.js
index 7f450b85..aa8992a8 100644
--- a/dist/query.js
+++ b/dist/query.js
@@ -70923,6 +70923,7 @@ var require_fast_uri = __commonJS({
       return uriTokens.join("");
     }
     var URI_PARSE = /^(?:([^#/:?]+):)?(?:\/\/((?:([^#/?@]*)@)?(\[[^#/?\]]+\]|[^#/:?]*)(?::(\d*))?))?([^#?]*)(?:\?([^#]*))?(?:#((?:.|[\n\r])*))?/u;
+    var AUTHORITY_PREFIX = /^(?:[^#/:?]+:)?\/\/([^/?#]*)/;
     function getParseError(parsed, matches) {
       if (matches[2] !== void 0 && parsed.path && parsed.path[0] !== "/") {
         return 'URI path must start with "/" when authority is present.';
@@ -70952,6 +70953,11 @@ var require_fast_uri = __commonJS({
           uri = "//" + uri;
         }
       }
+      const authorityMatch = uri.match(AUTHORITY_PREFIX);
+      if (authorityMatch !== null && authorityMatch[1].indexOf("\\") !== -1) {
+        parsed.error = "URI authority must not contain a literal backslash.";
+        malformedAuthorityOrPort = true;
+      }
       const matches = uri.match(URI_PARSE);
       if (matches) {
         parsed.scheme = matches[1];
@@ -70995,7 +71001,7 @@ var require_fast_uri = __commonJS({
         if (!options.unicodeSupport && (!schemeHandler || !schemeHandler.unicodeSupport)) {
           if (parsed.host && (options.domainHost || schemeHandler && schemeHandler.domainHost) && isIP === false && nonSimpleDomain(parsed.host)) {
             try {
-              parsed.host = URL.domainToASCII(parsed.host.toLowerCase());
+              parsed.host = new URL("http://" + parsed.host).hostname;
             } catch (e) {
               parsed.error = parsed.error || "Host's domain name can not be converted to ASCII: " + e;
             }
diff --git a/dist/update-repo-task-status.js b/dist/update-repo-task-status.js
index 5d92b8c5..24b5c206 100644
--- a/dist/update-repo-task-status.js
+++ b/dist/update-repo-task-status.js
@@ -22481,6 +22481,7 @@ var require_fast_uri = __commonJS({
       return uriTokens.join("");
     }
     var URI_PARSE = /^(?:([^#/:?]+):)?(?:\/\/((?:([^#/?@]*)@)?(\[[^#/?\]]+\]|[^#/:?]*)(?::(\d*))?))?([^#?]*)(?:\?([^#]*))?(?:#((?:.|[\n\r])*))?/u;
+    var AUTHORITY_PREFIX = /^(?:[^#/:?]+:)?\/\/([^/?#]*)/;
     function getParseError(parsed, matches) {
       if (matches[2] !== void 0 && parsed.path && parsed.path[0] !== "/") {
         return 'URI path must start with "/" when authority is present.';
@@ -22510,6 +22511,11 @@ var require_fast_uri = __commonJS({
           uri = "//" + uri;
         }
       }
+      const authorityMatch = uri.match(AUTHORITY_PREFIX);
+      if (authorityMatch !== null && authorityMatch[1].indexOf("\\") !== -1) {
+        parsed.error = "URI authority must not contain a literal backslash.";
+        malformedAuthorityOrPort = true;
+      }
       const matches = uri.match(URI_PARSE);
       if (matches) {
         parsed.scheme = matches[1];
@@ -22553,7 +22559,7 @@ var require_fast_uri = __commonJS({
         if (!options.unicodeSupport && (!schemeHandler || !schemeHandler.unicodeSupport)) {
           if (parsed.host && (options.domainHost || schemeHandler && schemeHandler.domainHost) && isIP === false && nonSimpleDomain(parsed.host)) {
             try {
-              parsed.host = URL.domainToASCII(parsed.host.toLowerCase());
+              parsed.host = new URL("http://" + parsed.host).hostname;
             } catch (e) {
               parsed.error = parsed.error || "Host's domain name can not be converted to ASCII: " + e;
             }
diff --git a/dist/update-repo-task-statuses.js b/dist/update-repo-task-statuses.js
index b89b2067..829a2177 100644
--- a/dist/update-repo-task-statuses.js
+++ b/dist/update-repo-task-statuses.js
@@ -22481,6 +22481,7 @@ var require_fast_uri = __commonJS({
       return uriTokens.join("");
     }
     var URI_PARSE = /^(?:([^#/:?]+):)?(?:\/\/((?:([^#/?@]*)@)?(\[[^#/?\]]+\]|[^#/:?]*)(?::(\d*))?))?([^#?]*)(?:\?([^#]*))?(?:#((?:.|[\n\r])*))?/u;
+    var AUTHORITY_PREFIX = /^(?:[^#/:?]+:)?\/\/([^/?#]*)/;
     function getParseError(parsed, matches) {
       if (matches[2] !== void 0 && parsed.path && parsed.path[0] !== "/") {
         return 'URI path must start with "/" when authority is present.';
@@ -22510,6 +22511,11 @@ var require_fast_uri = __commonJS({
           uri = "//" + uri;
         }
       }
+      const authorityMatch = uri.match(AUTHORITY_PREFIX);
+      if (authorityMatch !== null && authorityMatch[1].indexOf("\\") !== -1) {
+        parsed.error = "URI authority must not contain a literal backslash.";
+        malformedAuthorityOrPort = true;
+      }
       const matches = uri.match(URI_PARSE);
       if (matches) {
         parsed.scheme = matches[1];
@@ -22553,7 +22559,7 @@ var require_fast_uri = __commonJS({
         if (!options.unicodeSupport && (!schemeHandler || !schemeHandler.unicodeSupport)) {
           if (parsed.host && (options.domainHost || schemeHandler && schemeHandler.domainHost) && isIP === false && nonSimpleDomain(parsed.host)) {
             try {
-              parsed.host = URL.domainToASCII(parsed.host.toLowerCase());
+              parsed.host = new URL("http://" + parsed.host).hostname;
             } catch (e) {
               parsed.error = parsed.error || "Host's domain name can not be converted to ASCII: " + e;
             }
diff --git a/package-lock.json b/package-lock.json
index 3e812896..5b3ec074 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -6521,9 +6521,9 @@
       "license": "MIT"
     },
     "node_modules/fast-uri": {
-      "version": "3.1.2",
-      "resolved": "https://registry.npmjs.org/fast-uri/-/fast-uri-3.1.2.tgz",
-      "integrity": "sha512-rVjf7ArG3LTk+FS6Yw81V1DLuZl1bRbNrev6Tmd/9RaroeeRRJhAt7jg/6YFxbvAQXUCavSoZhPPj6oOx+5KjQ==",
+      "version": "3.1.4",
+      "resolved": "https://registry.npmjs.org/fast-uri/-/fast-uri-3.1.4.tgz",
+      "integrity": "sha512-8JnbkQ4juDyvYs4mgFGQqg4yCYtFDtUtmp2QIQq11ZZe5CFQ5wcqm1rqDgAh/QdMySuBnPzMUiJUNZG5N/AiQw==",
       "funding": [
         {
           "type": "github",