diff --git a/src/utils.ts b/src/utils.ts
index a83fcb0..2c6670d 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -14,8 +14,8 @@ export function logDebug(msg: string) {
   }
 }
 
-const EXTRACT_REG = /^@([a-z][a-z0-9-]+)\/([a-z0-9-]+)(@(.+))?$/;
-const EXTRACT_REG_PROXY = /^@jsr\/([a-z][a-z0-9-]+)__([a-z0-9-]+)(@(.+))?$/;
+const EXTRACT_REG = /^@([a-z0-9-]+)\/([a-z0-9-]+)(@(.+))?$/;
+const EXTRACT_REG_PROXY = /^@jsr\/([a-z0-9-]+)__([a-z0-9-]+)(@(.+))?$/;
 
 export class JsrPackageNameError extends Error {}
 
diff --git a/test/utils.test.ts b/test/utils.test.ts
index 74f7488..9e712ef 100644
--- a/test/utils.test.ts
+++ b/test/utils.test.ts
@@ -3,6 +3,7 @@ import * as path from "node:path";
 import { runInTempDir } from "./test_utils";
 import {
   findProjectDir,
+  JsrPackage,
   PkgJson,
   writeJson,
   writeTextFile,
@@ -94,3 +95,10 @@ describe("findProjectDir", () => {
     });
   });
 });
+
+describe("JsrPackage", () => {
+  it("should allow scopes starting with a number", () => {
+    JsrPackage.from("@0abc/foo");
+    JsrPackage.from("@jsr/0abc__foo");
+  });
+});