diff --git a/.travis.yml b/.travis.yml
index 8416703c1..f5fa15228 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,6 @@
 language: node_js
+node_js:
+  - "9"
 
 addons:
   apt:
diff --git a/.travis/update-wiki.sh b/.travis/update-wiki.sh
index b50efb62b..58d801374 100755
--- a/.travis/update-wiki.sh
+++ b/.travis/update-wiki.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/sh -e
 
 setup_git() {
   git config --global user.email "travis@travis-ci.org"