diff --git a/.travis.yml b/.travis.yml
index 7534198..a02b0a5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,8 +1,8 @@
 ---
-sudo: false
+os: linux
 language: ruby
 rvm:
-  - 2.6
-  - 2.5
-  - 2.4
-  - 2.3
+- 2.6
+- 2.5
+- 2.4
+- 2.3