diff --git a/README.md b/README.md
index 5e76edac..8b7b3513 100644
--- a/README.md
+++ b/README.md
@@ -37,9 +37,6 @@ tsup src/index.ts src/cli.ts
 ```
 
 This will output `dist/index.js` and `dist/cli.js`.
-
-Code splitting is enabled by default and supported in `cjs` and `esm` format.
-
 ## Documentation
 
 For complete usages, please dive into the [docs](https://tsup.egoist.sh).
diff --git a/docs/README.md b/docs/README.md
index ef96256d..fbe8e6a5 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -185,7 +185,7 @@ dist
 └── index.js
 ```
 
-## Code Splitting
+### Code Splitting
 
 Code splitting currently only works with the `esm` output format, and it's enabled by default. If you want code splitting for `cjs` output format as well, try using `--splitting` flag which is an experimental feature to get rid of [the limitation in esbuild](https://esbuild.github.io/api/#splitting).