diff --git a/tsconfig.json b/tsconfig.json
index 3c91846..decf503 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,7 +1,7 @@
 {
     "compilerOptions": {
         "outDir": "./dist",
-        "allowJs": true,
+        "allowJs": false,
         "target": "ES2015",
         "module": "CommonJS",
         "typeRoots": [