diff --git a/tsconfig.json b/tsconfig.json
index 3f37492..4e57187 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -17,6 +17,9 @@
     "skipLibCheck": true,
     "sourceMap": true,
     "strict": true,
+    "noImplicitAny": true,
+    "noImplicitReturns": true,
+    "noImplicitThis": true,
     "target": "esnext"
   }
 }