diff --git a/package.json b/package.json
index 86142513..bc51da8e 100644
--- a/package.json
+++ b/package.json
@@ -46,7 +46,7 @@
     "nyc": "6.1.1",
     "react": "0.14.7",
     "tslint": "3.6.0",
-    "typescript": "1.8.7"
+    "typescript": "1.8.9"
   },
   "dependencies": {
     "babylon": "6.7.0",