diff --git a/packages/core/src/util/fn.ts b/packages/core/src/util/fn.ts
index 9efe4622fc..828baf3bd7 100644
--- a/packages/core/src/util/fn.ts
+++ b/packages/core/src/util/fn.ts
@@ -1,4 +1,4 @@
-import { z } from "zod"
+import type { z } from "zod"
 
 export function fn<T extends z.ZodType, Result>(schema: T, cb: (input: z.infer<T>) => Result) {
   const result = (input: z.infer<T>) => {