diff --git a/package.json b/package.json
index 4def799..0fab4a0 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,6 @@
     "zone.js": "^0.6.23"
   },
   "devDependencies": {
-    "@types/core-js": "^0.9.34",
     "typescript": "^2.0.10"
   },
   "typings": "index.d.ts",
diff --git a/tsconfig.json b/tsconfig.json
index 89e1a25..2d5c639 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -6,7 +6,11 @@
         "emitDecoratorMetadata": true,
         "experimentalDecorators": true,
         "sourceMap": true,
-        "declaration": true
+        "declaration": true,
+        "lib": [
+            "es2015",
+            "dom"
+        ]
     },
     "files": [
         "index.ts"
@@ -14,4 +18,4 @@
     "exclude": [
         "node_modules"
     ]
-}
+}
\ No newline at end of file