diff --git a/tsconfig.json b/tsconfig.json
index 983313f2..425c0fac 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,4 +1,4 @@
 {
   "extends": "@ethereumjs/config-tsc",
-  "include": ["src/**/*.ts", "test/**/*.ts", "typings/**/*.js"]
+  "include": ["src/**/*.ts", "test/**/*.ts", "typings/**/*.ts"]
 }