diff --git a/README.md b/README.md
index 6e8af63..6cb8685 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ Within Python Virtual Environment:
 
 2. Run 'setup.py' to set your SMTP parameters and desired email subject. They will be saved to 'secrets/secrets.txt' for further use.
 
-3. Run 'mailing.py' to start emailing your inactive users (last sign in at older that a year). Their username, account_id, email, delivery status (True if successful) and delivery date will be written to Postgresql database. There is another column, 'deleted', False by default. Will be useful to track deleted/not deleted inactive users if you choose to do so.
+3. Run 'mailing.py' to start emailing your inactive users ('last_sign_in_at' older than a year). Their username, account_id, email, delivery status (True if successful) and delivery date will be written to Postgresql database. There is another column, 'deleted', False by default. Will be useful to track deleted/not deleted inactive users if you choose to do so.
 
 4. Use your favourite scheduling method to set mailing.py to run regularly. Column 'elapsed_days' of mailing's database will be updated so you can decide actions after some time.