diff --git a/Gemfile b/Gemfile
index b50c2e5a6..696c876c1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -12,6 +12,7 @@ gem 'activerecord-session_store'
 gem 'json'
 
 # Supported DBs
+gem 'activerecord-nulldb-adapter', group: :nulldb
 gem 'mysql2', group: :mysql
 gem 'pg', group: :postgres
 
diff --git a/Gemfile.lock b/Gemfile.lock
index fa86ca667..faac04b1b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -30,6 +30,8 @@ GEM
       activemodel (= 4.2.7.1)
       activesupport (= 4.2.7.1)
       arel (~> 6.0)
+    activerecord-nulldb-adapter (0.3.6)
+      activerecord (>= 2.0.0)
     activerecord-session_store (1.0.0)
       actionpack (>= 4.0, < 5.1)
       activerecord (>= 4.0, < 5.1)
@@ -390,6 +392,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  activerecord-nulldb-adapter
   activerecord-session_store
   autoprefixer-rails
   biz