diff --git a/.travis.yml b/.travis.yml
index a01d453..680d9e9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,3 +1,3 @@
 language: ruby
 rvm:
-  - 2.4.1
+  - 2.6.4
diff --git a/Gemfile b/Gemfile
index 2947436..bf3807e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,4 @@
-ruby '2.6.3'
+ruby '2.6.4'
 source 'https://rubygems.org'
 group :development do
   group :test do