diff --git a/tsconfig.json b/tsconfig.json
index 2297191..a635010 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -5,6 +5,7 @@
         "noImplicitAny": true,
         "strictNullChecks": true,
         "resolveJsonModule": true,
+        "noImplicitReturns": true,
         "esModuleInterop": true,
         "target": "es6",
         "module": "commonjs",
@@ -25,4 +26,4 @@
     "exclude": [
         "node_modules"
     ]
-}
\ No newline at end of file
+}