RewriteEngine On

RewriteCond %{HTTPS} off [OR]

RewriteCond %{HTTP:X-Forwarded-SSL} !on [OR]

RewriteCond %{HTTP_HOST} ^wiktordabkowski\.com$ [NC]

RewriteCond %{HTTP_HOST} !^www\.wiktordabkowski\.com$ [NC]

RewriteRule ^(.*)$ https://www.wiktordabkowski.com/$1 [R=301,L]