diff --git a/dist/index.js b/dist/index.js
index 664c9404..234c64a2 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -1177,7 +1177,7 @@ async function customPackage(pkg, type, version, os_version) {
 }
 exports.customPackage = customPackage;
 async function parseExtensionSource(extension, prefix) {
-    const regex = /(\w+)-(.+:\/\/.+(?:[.:].+)+\/)?([\w.-]+)\/([\w.-]+)@(.+)/;
+    const regex = /(\w+)-(\w+:\/\/.{1,253}(?:[.:][^:/\s]{2,63})+\/)?([\w.-]+)\/([\w.-]+)@(.+)/;
     const matches = regex.exec(extension);
     matches[2] = matches[2] ? matches[2].slice(0, -1) : 'https://github.com';
     return await joins('\nadd_extension_from_source', ...matches.splice(1, matches.length), prefix);
diff --git a/src/utils.ts b/src/utils.ts
index ab9579f7..1692fbc2 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -492,7 +492,8 @@ export async function parseExtensionSource(
   prefix: string
 ): Promise<string> {
   // Groups: extension, domain url, org, repo, release
-  const regex = /(\w+)-(.+:\/\/.+(?:[.:].+)+\/)?([\w.-]+)\/([\w.-]+)@(.+)/;
+  const regex =
+    /(\w+)-(\w+:\/\/.{1,253}(?:[.:][^:/\s]{2,63})+\/)?([\w.-]+)\/([\w.-]+)@(.+)/;
   const matches = regex.exec(extension) as RegExpExecArray;
   matches[2] = matches[2] ? matches[2].slice(0, -1) : 'https://github.com';
   return await joins(