diff --git a/config/environments/development.rb b/config/environments/development.rb
index 5b6263e3..78949098 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -114,6 +114,5 @@ Osem::Application.configure do
     end
   end
 
-  config.assets.precompile += ['mailbot.css']
   config.active_record.verbose_query_logs = true
 end
diff --git a/config/environments/test.rb b/config/environments/test.rb
index 1a9d4d7b..53071a55 100644
--- a/config/environments/test.rb
+++ b/config/environments/test.rb
@@ -51,6 +51,4 @@ Osem::Application.configure do
     Timecop.travel(t)
     ActiveSupport::Deprecation.silenced = true
   end
-
-  config.assets.precompile += ['mailbot.css']
 end
diff --git a/config/initializers/assets.rb b/config/initializers/assets.rb
index 01ef3e66..6ed78e1a 100644
--- a/config/initializers/assets.rb
+++ b/config/initializers/assets.rb
@@ -9,3 +9,4 @@ Rails.application.config.assets.version = '1.0'
 # Precompile additional assets.
 # application.js, application.css, and all non-JS/CSS in app/assets folder are already added.
 # Rails.application.config.assets.precompile += %w( search.js )
+Rails.application.config.assets.precompile += ['mailbot.css']