diff --git a/package.json b/package.json
index 6990d78..84343ce 100644
--- a/package.json
+++ b/package.json
@@ -23,6 +23,6 @@
     "mocha": "3.4.2",
     "nodemon": "1.11.0",
     "npm-run-all": "4.1.3",
-    "prettier": "1.12.1"
+    "prettier": "1.15.3"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index cb950ca..e66b8a2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1582,9 +1582,9 @@ preserve@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/preserve/-/preserve-0.2.0.tgz#815ed1f6ebc65926f865b310c0713bcb3315ce4b"
 
-prettier@1.12.1:
-  version "1.12.1"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.12.1.tgz#c1ad20e803e7749faf905a409d2367e06bbe7325"
+prettier@1.15.3:
+  version "1.15.3"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.15.3.tgz#1feaac5bdd181237b54dbe65d874e02a1472786a"
 
 process-nextick-args@~1.0.6:
   version "1.0.7"