diff --git a/.travis.yml b/.travis.yml
index d3f734a..946a730 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,7 +6,14 @@ services:
   - postgresql
 rvm:
   - 2.5.7
+  - 2.7.2
 before_install: gem install bundler -v 2.1.4
 before_script:
   - psql -c 'CREATE DATABASE pg_sql_caller_test;' -U postgres
   - cp -v spec/config/database.travis.yml spec/config/database.yml
+script: bundle exec rake
+env:
+  matrix:
+    - AR=5.2.0
+    - AR=6.0.0
+    - AR=6.1.0
diff --git a/Gemfile b/Gemfile
index cbdb778..72732c6 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,6 +5,7 @@ source 'https://rubygems.org'
 # Specify your gem's dependencies in pg_sql_caller.gemspec
 gemspec
 
+gem 'activerecord', "~> #{ENV.fetch('AR', '6.0.0')}"
 gem 'database_cleaner'
 gem 'pg'
 gem 'rake', '~> 12.0'