diff --git a/app/controllers/concerns/auth/captcha_concern.rb b/app/controllers/concerns/auth/captcha_concern.rb
index cfd93978cea..c01da212499 100644
--- a/app/controllers/concerns/auth/captcha_concern.rb
+++ b/app/controllers/concerns/auth/captcha_concern.rb
@@ -10,7 +10,7 @@ module Auth::CaptchaConcern
   end
 
   def captcha_available?
-    ENV['HCAPTCHA_SECRET_KEY'].present? && ENV['HCAPTCHA_SITE_KEY'].present?
+    Rails.configuration.x.captcha.secret_key.present? && Rails.configuration.x.captcha.site_key.present?
   end
 
   def captcha_enabled?
diff --git a/app/helpers/admin/settings_helper.rb b/app/helpers/admin/settings_helper.rb
index 6937331e1a6..9b950d5a637 100644
--- a/app/helpers/admin/settings_helper.rb
+++ b/app/helpers/admin/settings_helper.rb
@@ -2,7 +2,7 @@
 
 module Admin::SettingsHelper
   def captcha_available?
-    ENV['HCAPTCHA_SECRET_KEY'].present? && ENV['HCAPTCHA_SITE_KEY'].present?
+    Rails.configuration.x.captcha.secret_key.present? && Rails.configuration.x.captcha.site_key.present?
   end
 
   def login_activity_title(activity)
diff --git a/config/application.rb b/config/application.rb
index 5aca74fd1c6..11fe99d40a9 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -112,6 +112,8 @@ module Mastodon
       end
     end
 
+    config.x.captcha = config_for(:captcha)
+
     config.to_prepare do
       Doorkeeper::AuthorizationsController.layout 'modal'
       Doorkeeper::AuthorizedApplicationsController.layout 'admin'
diff --git a/config/captcha.yml b/config/captcha.yml
new file mode 100644
index 00000000000..a9f54588c71
--- /dev/null
+++ b/config/captcha.yml
@@ -0,0 +1,3 @@
+shared:
+  secret_key: <%= ENV.fetch('HCAPTCHA_SECRET_KEY', nil) %>
+  site_key: <%= ENV.fetch('HCAPTCHA_SITE_KEY', nil) %>