diff --git a/tsup.config.ts b/tsup.config.ts
index 1302d01..fbb06a5 100644
--- a/tsup.config.ts
+++ b/tsup.config.ts
@@ -1,7 +1,7 @@
 import { defineConfig } from "tsup";
 
 export default defineConfig({
-  format: ["cjs", "esm"],
+  format: ["esm"],
   entry: ["./src/index.ts"],
   dts: true,
   shims: true,