README.md in pg_export-0.5.0 vs README.md in pg_export-0.5.1

@@ -69,10 +69,10 @@
     # /etc/environment
     BACKUP_FTP_HOST="yourftp.example.com"
     BACKUP_FTP_USER="user"
     BACKUP_FTP_PASSWORD="password"
     
-__Step 2.__ Put dump encryption key into env variable (at least 16 characters). Dumps will be SSL(AES-128-CBC) encrypted using that key.
+__Step 2.__ Put dump encryption key into env variable (exactly 16 characters). Dumps will be SSL(AES-128-CBC) encrypted using that key.
  
     # /etc/environment
     DUMP_ENCRYPTION_KEY="1234567890abcdef"
     
 Variables cannot include `#` sign, [more info](http://serverfault.com/questions/539730/environment-variable-in-etc-environment-with-pound-hash-sign-in-the-value).