diff --git a/deno/lib/__tests__/string.test.ts b/deno/lib/__tests__/string.test.ts
index ac72d42cd..78a4458ef 100644
--- a/deno/lib/__tests__/string.test.ts
+++ b/deno/lib/__tests__/string.test.ts
@@ -276,7 +276,6 @@ test("cuid2", () => {
   validStrings.forEach((s) => cuid2.parse(s));
   const invalidStrings = [
     "", // empty string
-    "1z4a98xxat96iws9zmbrgj3a", // starts with a number
     "tz4a98xxat96iws9zMbrgj3a", // include uppercase
     "tz4a98xxat96iws-zmbrgj3a", // involve symbols
   ];
diff --git a/src/__tests__/string.test.ts b/src/__tests__/string.test.ts
index 915532272..2eae674b1 100644
--- a/src/__tests__/string.test.ts
+++ b/src/__tests__/string.test.ts
@@ -275,7 +275,6 @@ test("cuid2", () => {
   validStrings.forEach((s) => cuid2.parse(s));
   const invalidStrings = [
     "", // empty string
-    "1z4a98xxat96iws9zmbrgj3a", // starts with a number
     "tz4a98xxat96iws9zMbrgj3a", // include uppercase
     "tz4a98xxat96iws-zmbrgj3a", // involve symbols
   ];
diff --git a/src/types.ts b/src/types.ts
index d7f92f479..d0c5bb204 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -572,7 +572,7 @@ export interface ZodStringDef extends ZodTypeDef {
 }
 
 const cuidRegex = /^c[^\s-]{8,}$/i;
-const cuid2Regex = /^[a-z][a-z0-9]*$/;
+const cuid2Regex = /^[0-9a-z]+$/;
 const ulidRegex = /^[0-9A-HJKMNP-TV-Z]{26}$/;
 // const uuidRegex =
 //   /^([a-f0-9]{8}-[a-f0-9]{4}-[1-5][a-f0-9]{3}-[a-f0-9]{4}-[a-f0-9]{12}|00000000-0000-0000-0000-000000000000)$/i;