diff --git a/package.json b/package.json
index 2169dfe..e0e2b0c 100644
--- a/package.json
+++ b/package.json
@@ -24,8 +24,8 @@
     }
   ],
   "dependencies": {
-    "async": "^0.9.0",
+    "async": "^2.5.0",
     "loader-utils": "~0.2.2",
-    "source-map": "~0.1.33"
+    "source-map": "~0.6.1"
   }
 }