diff --git a/lib/tasks/cleardb.rake b/lib/tasks/cleardb.rake
new file mode 100644
index 00000000..4534e7ef
--- /dev/null
+++ b/lib/tasks/cleardb.rake
@@ -0,0 +1,11 @@
+namespace :db do
+  desc 'setup DATABASE_URL from CLEARDB_DATABASE_URL in .env'
+  task cleardb_env: :environment do
+    unless ENV['CLEARDB_DATABASE_URL'].nil?
+      cleardb_url = ENV['CLEARDB_DATABASE_URL'].gsub(/^mysql:\/\//, 'mysql2://')
+      dot_env = File.open(Rails.root.join(".env"), 'w')
+      dot_env.puts "DATABASE_URL=\"#{cleardb_url}\""
+      dot_env.close
+    end
+  end
+end