diff --git a/texttospeech/package.json b/texttospeech/package.json
index faafa946f1..1ec7a32055 100644
--- a/texttospeech/package.json
+++ b/texttospeech/package.json
@@ -13,7 +13,6 @@
   },
   "dependencies": {
     "@google-cloud/text-to-speech": "^0.3.0",
-    "async": "^2.5.0",
     "yargs": "^12.0.0"
   },
   "devDependencies": {