WWW or non-WWW

If you chosen www version

RewriteEngine on
RewriteCond %{HTTP_HOST} !^www.naprej.com [NC]
RewriteRule (.*) http://www.naprej.com/$1 [R=301,L]

If you chosen non-www version

RewriteEngine on
RewriteCond %{HTTP_HOST} !^www.naprej.com [NC]
RewriteRule (.*) http://www.naprej.com/$1 [R=301,L]

Tell your choice to Google

Go to Google Webmaster Tools, Site configuration → Settings and choose a “Preferred domain”.

Note, that both www and non-www versions of your domain should be verified.