diff --git a/circle.yml b/circle.yml
index 60febd0e..cdee7f9b 100644
--- a/circle.yml
+++ b/circle.yml
@@ -1,8 +1,10 @@
 # https://circleci.com/docs/install-and-use-yarn/
 
 machine:
+  node:
+    version: 6.9.5
   environment:
-    YARN_VERSION: 0.18.1
+    YARN_VERSION: 0.20.3
     PATH: "${PATH}:${HOME}/.yarn/bin:${HOME}/${CIRCLE_PROJECT_REPONAME}/node_modules/.bin"
 
 dependencies:
diff --git a/package.json b/package.json
index f264fd09..cd8ff5ab 100644
--- a/package.json
+++ b/package.json
@@ -48,7 +48,7 @@
     "heroku-postbuild": "yarn run build"
   },
   "engines": {
-    "node": "6.9.4",
+    "node": "6.9.5",
     "yarn": "0.20.3"
   }
 }