diff --git a/package.json b/package.json
index 76d152cf595..0fc51ebb720 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
     "chrome-launcher": "^0.10.2",
     "chrome-remote-interface": "^0.25.6",
     "eslint": "^4.19.1",
-    "prettier": "^1.13.7",
+    "prettier": "^1.13.0",
     "puppeteer": "^1.4.0"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 88d8048b6cb..d908e1a0967 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -813,9 +813,9 @@ prelude-ls@~1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/prelude-ls/-/prelude-ls-1.1.2.tgz#21932a549f5e52ffd9a827f570e04be62a97da54"
 
-prettier@^1.13.7:
-  version "1.13.7"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.13.7.tgz#850f3b8af784a49a6ea2d2eaa7ed1428a34b7281"
+prettier@1.13.4:
+  version "1.13.4"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.13.4.tgz#31bbae6990f13b1093187c731766a14036fa72e6"
 
 process-nextick-args@~1.0.6:
   version "1.0.7"