diff --git a/package.json b/package.json
index 7fe5e00..3d6ba47 100644
--- a/package.json
+++ b/package.json
@@ -58,7 +58,7 @@
     "require-dir": "0.3.0",
     "ts-loader": "0.8.1",
     "tslint": "3.5.0",
-    "typescript": "1.8.7",
+    "typescript": "1.8.9",
     "webpack": "1.12.14",
     "webpack-dev-server": "1.14.0"
   },