diff --git a/.circle/config.yml b/.circle/config.yml
index 86a48c2b..da0e12e2 100644
--- a/.circle/config.yml
+++ b/.circle/config.yml
@@ -2,7 +2,7 @@ version: 2
 jobs:
   build:
     docker:
-      - image: circleci/node:10
+      - image: circleci/node:6.15
 steps:
   - checkout
   - restore_cache:
diff --git a/package.json b/package.json
index 20f89db2..bcb37f8f 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
   },
   "main": "src/index",
   "engines": {
-    "node": ">= 0.10.21"
+    "node": "^6.15"
   },
   "scripts": {
     "test": "jest"