diff --git a/.travis.yml b/.travis.yml
index 4326581272..e6e2305c1b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,7 @@
 language: node_js
-sudo: false
+# Work-around for https://github.com/travis-ci/travis-ci/issues/8836#issuecomment-356362524.
+# (Restore `sudo: false` once that is resolved.)
+sudo: required
 dist: trusty
 node_js:
   - '8.9.1'