diff --git a/tsconfig.json b/tsconfig.json
index 38935262b5b..9c54164725f 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -12,7 +12,8 @@
     ],
     "sourceMap": true,
     "strictNullChecks": true,
-    "experimentalDecorators": true
+    "experimentalDecorators": true,
+    "alwaysStrict": true
   },
   "exclude": [
     "node_modules",