diff --git a/package.json b/package.json
index 94ab9a7d4..ea0c8924f 100644
--- a/package.json
+++ b/package.json
@@ -78,7 +78,7 @@
     "husky": "^0.14.0",
     "mocha": "^4.0.0",
     "nyc": "^11.0.2",
-    "prettier": "1.9.0",
+    "prettier": "1.9.1",
     "rimraf": "^2.6.1",
     "semantic-release": "^10.0.1",
     "sinon": "^4.0.0",