diff --git a/Gemfile b/Gemfile
index 19e7f2d5e..f876246a0 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,7 +3,7 @@ git_source(:bc) { |repo| "https://github.com/basecamp/#{repo}" }
 ruby file: ".ruby-version"
 
 gem "rails", github: "rails/rails", branch: "main"
-gem "active_record-tenanted", bc: "active_record-tenanted"
+gem "active_record-tenanted", bc: "active_record-tenanted", branch: "fizzy-temporary"
 
 # Assets & front end
 gem "importmap-rails"
diff --git a/Gemfile.lock b/Gemfile.lock
index 214bb8df5..4f3079ff6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,6 +1,7 @@
 GIT
   remote: https://github.com/basecamp/active_record-tenanted
-  revision: ac50c284049388344ba2603eae114e34fcf6bce0
+  revision: d33ed3f81084946b4dbbc1d482d0aa342bd84873
+  branch: fizzy-temporary
   specs:
     active_record-tenanted (0.1.0)
       activerecord (>= 8.1.alpha)
diff --git a/config/initializers/tenanting.rb b/config/initializers/tenanting.rb
index b05e90632..1a1debe67 100644
--- a/config/initializers/tenanting.rb
+++ b/config/initializers/tenanting.rb
@@ -1,3 +1,4 @@
 Rails.application.configure do |config|
-  config.middleware.use ActiveRecord::Tenanted::TenantSelector, "ApplicationRecord", ->(request) { request.subdomain }
+  # uuugh this resolver proc is so gross.
+  config.middleware.use ActiveRecord::Tenanted::TenantSelector, "ApplicationRecord", ->(request) { request.subdomain.split(".").first }
 end