How to fix ssl cert expiring soon on OpenCart

Steps for OpenCart

1. SSL is managed at the hosting/server level. Renew through your hosting control panel or Let's Encrypt.
2. After renewal, update config.php and admin/config.php in the OpenCart root to ensure HTTP_SERVER and HTTPS_SERVER constants use your https:// URL.
3. In OpenCart Admin go to System → Settings → your store → Server tab and confirm 'Use SSL' is set to Yes.

What is ssl cert expiring soon?

An SSL/TLS certificate is the digital credential that enables the padlock icon and "https://" in your store's address bar. It proves your site is legitimate and encrypts all data — including passwords and payment details — traveling between your customers' browsers and your server. Every certificate has an expiry date, and once it lapses (or gets dangerously close to expiring), browsers display a full-page "Your connection is not private" warning that blocks visitors from reaching your store. Renewing means obtaining a fresh certificate and installing it before the old one expires.

An expired SSL certificate instantly kills conversions: browsers like Chrome and Firefox show a hard red-screen security warning that most shoppers will not click past, meaning your store becomes effectively unreachable. Google also treats HTTPS as a ranking signal, so a lapsed certificate can cause ranking drops and removal from Shopping feeds. Beyond lost revenue, transmitting customer data over an insecure or unverified connection is a data-protection compliance failure (GDPR, PCI-DSS, CCPA) that carries real legal and financial risk. Acting with at least 30 days' lead time ensures there is buffer for any renewal delays or propagation issues.

See the complete Ssl cert expiring soon guide for every platform and the full background.