diff --git a/.travis.yml b/.travis.yml
index f9edbb2..304c64c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,7 +5,7 @@ services:
   - xvfb
 
 rvm:
-  - 2.6.3
+  - 2.6.4
 
 env:
   - RAILS_VERSION=6.0.0
@@ -19,7 +19,7 @@ addons:
 
 cache:
   directories:
-    - /home/travis/.rvm/gems/ruby-2.6.3
+    - /home/travis/.rvm/gems/ruby-2.6.4
 
 install: ./ci/build.sh