diff --git a/.travis.yml b/.travis.yml
index 301d20c..4b22c93 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,10 +1,9 @@
 language: node_js
 node_js:
-  - "node"
-  - "10"
-  - "8"
-  - "7"
-  - "6"
-  - "5"
+  - 'node'
+  - '10'
+  - '8'
+  - '7'
+  - '6'
 after_success:
   - npm run report-coverage