diff --git a/.travis.yml b/.travis.yml
index e4f0a017d..47c1f4361 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,10 +1,7 @@
 language: ruby
 rvm:
-  - 2.5.0
+  - 2.5
 script:
   - make -B _site
   - if ! make test; then make test-warning; exit 16; fi
-cache:
-  directories:
-    - node_modules
-    - _site
+cache: bundler