Transport Layer Security (TLS)
TLS (Transport Layer Security) is an encryption protocol used to secure communications over the internet. When you see a lock icon in the address bar of your browser next to a URL that starts with
https://, the connection is taking place over TLS. This includes both your and your customers' connections to Shopify. The most recent version of the TLS protocol is TLS 1.2.
On May 31, 2018, Shopify will remove support for TLS versions 1.0 and 1.1 to better protect your and your customers' data. If your browser does not support TLS 1.2, then after May 31, 2018 you will see connection errors when you browse to the Shopify website, your storefront, or your admin page.
Customers attempting to access your Shopify storefront whose browsers do not support TLS 1.2 will also see connection errors and won't be able to load your site after May 31, 2018.
If your browser does not support TLS 1.2, then we recommend upgrading to a supported browser version.
Check for TLS 1.2 support
The most recent two versions of Shopify's supported browsers include TLS 1.2 support. When you visit Shopify or a Shopify store using one of these browser versions, your connection will take place over TLS 1.2.
Earlier versions of browsers and browsers not officially supported by Shopify might also support TLS 1.2. Visit the SSL Labs SSL Test to check the highest version of TLS supported by your browser. The SSL version in use will display under Protocol Version.
You should also ensure that your computer or mobile operating system is as up to date as possible, especially if you use an older version of Windows.