diff --git a/Gemfile b/Gemfile
index fe1d260865..305f95dac7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -18,6 +18,7 @@ else
     # rubocop:disable Bundler/DuplicatedGem
     gem "actionview"
     gem "activemodel"
+    gem "activerecord"
     gem "activesupport"
     gem "railties"
     # rubocop:enable Bundler/DuplicatedGem
diff --git a/demo/Gemfile b/demo/Gemfile
index 25f0820ef7..bf73c2a379 100644
--- a/demo/Gemfile
+++ b/demo/Gemfile
@@ -17,6 +17,7 @@ else
     # rubocop:disable Bundler/DuplicatedGem
     gem "actionview"
     gem "activemodel"
+    gem "activerecord"
     gem "activesupport"
     gem "railties"
     # rubocop:enable Bundler/DuplicatedGem