diff --git a/package.json b/package.json
index b4d1c10..6423bdd 100644
--- a/package.json
+++ b/package.json
@@ -29,6 +29,6 @@
   "devDependencies": {
     "@types/graphql": "0.11.7",
     "@types/node": "8.5.2",
-    "typescript": "2.6.2"
+    "typescript": "3.4.1"
   }
 }