diff --git a/docs/configuration.md b/docs/configuration.md
index 87c18acc0e5757253699c4cb27e4abefc85f3bab..cf16fed8cd48fda7ba02e68bb7a75b102dcb35fb 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -41,9 +41,9 @@ module.exports = {
         'package.json',
         {
           packageFile: 'frontend/package.json',
-          labels: ['upgrade', 'frontend']
-        }
-      ]
+          labels: ['upgrade', 'frontend'],
+        },
+      ],
     },
     {
       repository: 'singapore/repo2',
@@ -52,19 +52,19 @@ module.exports = {
         'devDependencies',
         {
           depType: 'optionalDependencies',
-          labels: ['renovate', 'optional']
-        }
+          labels: ['renovate', 'optional'],
+        },
       ],
-      labels: ['renovate']
+      labels: ['renovate'],
     },
-    'singapore/repo3'
+    'singapore/repo3',
   ],
   packages: [
     {
       package: 'jquery',
-      labels: ['jquery', 'uhoh']
-    }
-  ]
+      labels: ['jquery', 'uhoh'],
+    },
+  ],
 };
 ```
 
diff --git a/package.json b/package.json
index 6a0555708e80ffc06110af9d9ac63a7c2d0e41f0..29a0f984fbc632db19611264409bcd6c2efada44 100644
--- a/package.json
+++ b/package.json
@@ -94,7 +94,7 @@
     "jest": "21.2.1",
     "mockdate": "2.0.2",
     "nock": "9.1.4",
-    "prettier": "1.9.0",
+    "prettier": "1.9.1",
     "semantic-release": "9.1.1"
   },
   "files": [
diff --git a/yarn.lock b/yarn.lock
index 1175eb490319be73e74ce3f1cc9fa5b49da43a36..9101b5f17462f751e7cd92a34f144c95cd1f30b9 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4272,9 +4272,9 @@ preserve@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/preserve/-/preserve-0.2.0.tgz#815ed1f6ebc65926f865b310c0713bcb3315ce4b"
 
-prettier@1.9.0:
-  version "1.9.0"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.9.0.tgz#1a7205bdb6126b30cf8c0a7b2b86997162e1ee3e"
+prettier@1.9.1:
+  version "1.9.1"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.9.1.tgz#41638a0d47c1efbd1b7d5a742aaa5548eab86d70"
 
 pretty-format@^21.2.1:
   version "21.2.1"