diff --git a/.nvmrc b/.nvmrc
new file mode 100644
index 0000000..45a4fb7
--- /dev/null
+++ b/.nvmrc
@@ -0,0 +1 @@
+8
diff --git a/.travis.yml b/.travis.yml
index 27abeb3..587bd3e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1 @@
 language: node_js
-node_js:
-  - '4'
-  - '5'
-  - '6'