diff --git a/package.json b/package.json
index d0d087d..2241664 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
   "scripts": {
     "compile": "node ./node_modules/vscode/bin/compile -p ./",
     "watch": "node ./node_modules/vscode/bin/compile -watch -p ./",
-    "postinstall": "node ./node_modules/vscode/bin/install",
+    "postinstall": "node ./node_modules/vscode/bin/install && typings prune && typings install",
     "lint": "tslint -c tslint.json \"src/**/*.ts\""
   },
   "devDependencies": {