Submit your site to the HSTS preload list
Easy implementable security headers: X-Content-Type-Options, X-XSS-Protection, X-Frame-Options, Expect-CT, Certificate Transparency, No Referrer When Downgrade header, Content Security Policy, Upgrade Insecure requests. Read the security headers article for more info
Mixed content fixer for the back-end
Extensive scan which enables you to detect the source of mixed content that couldn't be fixed automatically, with fix button
Improve security by enabling HTTP Strict Transport Security for your site
More here: https://really-simple-ssl.com/
ENJOY!!!