diff --git a/cli.ts b/cli.ts
index 69da5ec..20fde89 100644
--- a/cli.ts
+++ b/cli.ts
@@ -5,11 +5,11 @@
  */
 import { fox, customfox } from "randomfox";
 
-function parse(custom: string) {
+function parse(custom: string): void {
     if (custom) {
         console.log(`
 ===============Foxes===============
-${customfox(custom.split(" "))}
+${customfox(custom.split(" ")) as string}
 `);
     } else {
         console.log(`
@@ -19,4 +19,4 @@ ${fox()}
     }
 }
 
-export { parse }
\ No newline at end of file
+export { parse }