diff --git a/tsconfig.json b/tsconfig.json
index d563ab4b..80711f9d 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -5,6 +5,7 @@
     "module": "commonjs",
     "removeComments": false,
     "noImplicitAny": false,
+    "strictNullChecks": true,
     "sourceMap": false,
     "outDir": "lib",
     "declaration": true