diff --git a/.env.template b/.env.template
index 6bf2106..0eea31b 100644
--- a/.env.template
+++ b/.env.template
@@ -5,7 +5,7 @@ DB_HOST=
 DB_PORT=
 DB_NAME=
 
-#OR DB_URL= 
+#OR DATABASE_URL= 
 
 
 SMTP_SERVER=
diff --git a/mailer.rb b/mailer.rb
index 869b046..4f8b1a7 100644
--- a/mailer.rb
+++ b/mailer.rb
@@ -14,7 +14,7 @@ require 'tempfile'
 # Load environment variables from.env file
 Dotenv.load
 
-DB_URL = ENV.fetch('DB_URL')
+DB_URL = ENV.fetch('DATABASE_URL')
 
 DB_USER = ENV.fetch('DB_USER')
 DB_PASSWORD = ENV.fetch('DB_PASSWORD')