diff --git a/http-link-header/tsconfig.json b/http-link-header/tsconfig.json
index 12f90f78bd..9fb6d5e158 100644
--- a/http-link-header/tsconfig.json
+++ b/http-link-header/tsconfig.json
@@ -3,7 +3,8 @@
         "module": "commonjs",
         "target": "es6",
         "noImplicitAny": true,
-        "strictNullChecks": false,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
         "baseUrl": "../",
         "typeRoots": [
             "../"