diff --git a/package.json b/package.json
index ac65e09..7305fa7 100644
--- a/package.json
+++ b/package.json
@@ -46,7 +46,7 @@
     "ts-loader": "^0.8.2",
     "tslint": "^3.8.1",
     "tslint-loader": "^2.1.4",
-    "typescript": "^1.9.0",
+    "typescript": "^1.8.10",
     "typings": "^0.8.1",
     "webpack": "^1.13.0",
     "zone.js": "^0.6.12"