How to Fix: SSL Labs grade A

SSL Labs grade A is an important SEO check in the Security & Trust category. This is a high-priority SEO issue that should be addressed soon. It has a significant impact on your SEO performance.

What is This Check About?

This check verifies that your site’s TLS configuration is strong enough to earn an A grade from a server-side SSL test such as Qualys SSL Labs. Having HTTPS with a valid certificate is the floor, not the goal. The grade reflects the quality of the configuration behind that padlock — the protocol versions you allow, the cipher suites you offer, the strength of your key exchange, and whether you enforce HTTPS properly. The check fails when the certificate is fine but the configuration is dragging your grade down to a B or worse.

This is filed as HARD because the fixes live at the server and DNS layer, not in wp-admin, and a careless change can take a site offline. Treat it with the caution any TLS change deserves.

Why Does This Matter for SEO?

Security is both a direct and an indirect ranking factor, and the grade is a proxy for how seriously you take it. It matters because:

• HTTPS is a confirmed Google ranking signal, and a weak, outdated TLS setup undercuts the trust that signal is meant to convey
• Deprecated protocols and weak ciphers are genuine vulnerabilities — this check is protecting your users’ data, not just chasing a letter
• Browsers increasingly warn on or block weak configurations, and a scary warning between a searcher and your page destroys conversions no ranking can recover
• A strong configuration signals a well-maintained site, which aligns with the broader trust signals search engines reward

How to Check This Issue

You can identify this issue by:

1. Running your domain through the Qualys SSL Labs Server Test and reading the grade plus the specific deductions it lists
2. Noting exactly what is pulling the grade down — an enabled legacy protocol, weak cipher suites, a certificate chain issue, or missing forward secrecy
3. Checking whether HSTS is present and whether HTTP properly redirects to HTTPS everywhere
4. Running an SEO audit with the SEO Roadmap tool alongside the SSL Labs report to confirm no mixed-content or redirect issues compound the problem

How to Fix This in WordPress

Difficulty Level: HARD – This fix requires advanced technical skills or may need developer assistance.

Estimated Time: varies

Most of this happens at the server or host level. Read the SSL Labs report first — it tells you precisely what to fix — and change one thing at a time.

Step 1: Modernise protocols and ciphers

The most common grade-killers are old TLS versions and weak ciphers still enabled on the server. Disable the deprecated protocols the report flags and prefer strong, modern cipher suites with forward secrecy. On managed hosting this is often a support-ticket or a control-panel toggle; on your own server it is an edit to the web server’s TLS config. Either way, back up the working config before you touch it — a broken cipher list is how you take HTTPS down entirely.

Step 2: Fix the certificate chain and enable HSTS

Make sure the full certificate chain (including intermediates) is served correctly — an incomplete chain quietly drags the grade down. Then add an HSTS header so browsers only ever connect over HTTPS. Introduce HSTS carefully: start with a short max-age, confirm every subdomain genuinely works over HTTPS, and only then extend it. HSTS is a commitment you cannot easily walk back, so earn confidence before you lengthen it.

Step 3: Clean up HTTPS enforcement inside WordPress

This is the part that does live in WordPress. Confirm your Site Address and WordPress Address use https://, redirect all HTTP to HTTPS, and clear any mixed-content warnings by ensuring images, scripts, and embeds all load over HTTPS. A plugin such as Really Simple SSL can handle the common cases, but verify the result rather than assuming — a single hard-coded http:// asset is enough to flag a page as not fully secure.

Step 4: Verify the Fix

After making changes:

1. Clear your WordPress cache if you’re using a caching plugin
2. Re-run the SSL Labs Server Test and confirm the grade is now A and the earlier deductions are gone
3. Re-run the SEO Roadmap audit to confirm the issue is resolved and no mixed content remains
4. Check Google Search Console after a few days to ensure Google has recognized the fix

Lean on your host before you touch the config yourself

Here is my honest advice for anyone who is not fully comfortable editing server TLS settings: do not learn on your production site. The blast radius of a bad cipher change is the entire site going dark, and that is a much worse outcome than a B grade. On managed WordPress hosting, open a ticket — “please disable deprecated TLS protocols, serve the full chain, and help me enable HSTS safely” is a request a decent host handles routinely, often better and faster than a nervous manual edit. If you do run your own server, stage the change, test with SSL Labs against staging, and keep the previous working config one command away. An A grade is worth having. It is not worth an unplanned outage to get there in a hurry.

Recommended Tools & Plugins

These tools can help you fix and prevent this issue:

• Yoast SEO – Comprehensive SEO plugin with built-in checks
• Rank Math – Feature-rich SEO plugin with detailed analysis
• Google Search Console – Free tool to monitor your site’s search presence
• SEO Roadmap – Complete SEO audit and action plan tool

Common Mistakes to Avoid

• Editing production TLS config with no backup and no staging test
• Enabling a long HSTS max-age before confirming every subdomain works over HTTPS
• Serving an incomplete certificate chain and wondering why the grade stays low
• Assuming a plugin fixed mixed content without actually re-testing the pages
• Not verifying the fix was successful after implementation

Need More Help?

If you’re still having trouble fixing this issue, consider:

• Consulting with your host’s support team or a WordPress developer experienced in server security
• Checking the WordPress support forums for similar issues
• Reviewing your host’s documentation on TLS configuration and HSTS
• Running a complete site audit with SEO Roadmap for a prioritized action plan

This guide is part of the SEO Roadmap knowledge base – your complete resource for WordPress SEO optimization.