diff --git a/.travis.yml b/.travis.yml
index 7874f9bc..58932579 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,8 +7,10 @@ rvm:
   - 2.5
   - 2.4
 env:
-  - SINATRA_MAJOR=1
-  - SINATRA_MAJOR=2
+  - ACTIVESUPPORT_MAJOR=5 SINATRA_MAJOR=1
+  - ACTIVESUPPORT_MAJOR=5 SINATRA_MAJOR=2
+  - ACTIVESUPPORT_MAJOR=6 SINATRA_MAJOR=1
+  - ACTIVESUPPORT_MAJOR=6 SINATRA_MAJOR=2
 cache: bundler
 before_install:
   - gem update --system
diff --git a/Gemfile b/Gemfile
index b712ab78..e57e3f90 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,5 @@
 source "https://rubygems.org"
 
 gemspec
-gem 'sinatra', "~> #{ENV["SINATRA_MAJOR"] || 2}.x"
+gem "activesupport", "~> #{ENV["ACTIVESUPPORT_MAJOR"] || 6}.x"
+gem "sinatra", "~> #{ENV["SINATRA_MAJOR"] || 2}.x"