diff --git a/config/environments/production.rb b/config/environments/production.rb
index 2a382d0..b42f8a4 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -74,11 +74,11 @@ Rails.application.configure do
   config.action_mailer.perform_caching = false
   config.action_mailer.delivery_method = :smtp
   config.action_mailer.smtp_settings = {
-    address: File.read(ENV["SMTP_ADDRESS"]).strip,
-    port: File.read(ENV["SMTP_PORT"]).strip,
-    user_name: File.read(ENV["SMTP_USER_NAME"]).strip,
-    password: File.read(ENV["SMTP_PASSWORD"]).strip,
-    authentication: File.read(ENV["SMTP_AUTHENTICATION"].strip&.to_sym)
+    address: File.read("/run/secrets/smtp_address").strip,
+    port: File.read("/run/secrets/smtp_port").strip.to_i,
+    user_name: File.read("/run/secrets/smtp_user_name").strip,
+    password: File.read("/run/secrets/smtp_password").strip,
+    authentication: File.read("/run/secrets/smtp_authentication").strip.to_sym
   }
 
   # Ignore bad email addresses and do not raise email delivery errors.