diff --git a/package.json b/package.json
index 5c569db..83152a5 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
     "pre-commit": "^1.0.6",
     "tap-spec": "^4.1.1",
     "tslint": "^3.2.0",
-    "typescript": "^1.7.5",
+    "typescript": "^1.8.9",
     "typings": "^0.7.7"
   }
 }