diff --git a/tsconfig.json b/tsconfig.json
index 548bbe7fb..896c4c3b3 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -9,12 +9,10 @@
     "noImplicitAny": false,
     "sourceMap": true,
     "outDir": "./lib",
-    "declaration": true,
-    "types": [
-      "node"
-    ]
+    "declaration": true
   },
   "include": [
-    "./src/**/*.ts"
+    "./src/**/*.ts",
+    "./spec/**/*.ts",
   ]
 }