diff --git a/package.json b/package.json
index 9f532a2..7e2f4b8 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,7 @@
     "lint-staged": "6.0.0",
     "mocha": "4.0.1",
     "mz": "2.7.0",
-    "prettier": "1.8.2",
+    "prettier": "1.9.0",
     "rollup": "0.52.1",
     "rollup-plugin-commonjs": "8.2.6",
     "rollup-plugin-node-resolve": "3.0.0",