diff --git a/cjs-entry.d.ts b/cjs-entry.d.ts
new file mode 100644
index 00000000000..8e7dc53e0fe
--- /dev/null
+++ b/cjs-entry.d.ts
@@ -0,0 +1,3 @@
+declare const _default: typeof import('./lib/cjs/puppeteer/node').default;
+
+export default _default;
diff --git a/src/tsconfig.esm.json b/src/tsconfig.esm.json
index 487533061f4..29fabd9aa75 100644
--- a/src/tsconfig.esm.json
+++ b/src/tsconfig.esm.json
@@ -5,7 +5,5 @@
     "outDir": "../lib/esm/puppeteer",
     "module": "esnext"
   },
-  "references": [
-    { "path": "../vendor/tsconfig.esm.json"}
-  ]
+  "references": [{ "path": "../vendor/tsconfig.esm.json" }]
 }
diff --git a/tsconfig-esm.json b/tsconfig-esm.json
deleted file mode 100644
index 06d8e25d98b..00000000000
--- a/tsconfig-esm.json
+++ /dev/null
@@ -1,7 +0,0 @@
-{
-  "extends": "./tsconfig.json",
-  "compilerOptions": {
-    "outDir": "./lib/esm",
-    "module": "ES2015",
-  },
-}
diff --git a/tsconfig.base.json b/tsconfig.base.json
index 8e2d98cf2a1..b1229ed97d0 100644
--- a/tsconfig.base.json
+++ b/tsconfig.base.json
@@ -9,6 +9,6 @@
     "declaration": true,
     "declarationMap": true,
     "resolveJsonModule": true,
-    "sourceMap": true,
+    "sourceMap": true
   }
 }