Add the following code at the end of your .htaccess file
# Compress HTML, CSS, JavaScript, Text, XML and fontsAddOutputFilterByType DEFLATE application/javascriptAddOutputFilterByType DEFLATE application/rss+xmlAddOutputFilterByType DEFLATE application/vnd.ms-fontobjectAddOutputFilterByType DEFLATE application/x-fontAddOutputFilterByType DEFLATE application/x-font-opentypeAddOutputFilterByType DEFLATE application/x-font-otfAddOutputFilterByType DEFLATE application/x-font-truetypeAddOutputFilterByType DEFLATE application/x-font-ttfAddOutputFilterByType DEFLATE application/x-javascriptAddOutputFilterByType DEFLATE application/xhtml+xmlAddOutputFilterByType DEFLATE application/xmlAddOutputFilterByType DEFLATE font/opentypeAddOutputFilterByType DEFLATE font/otfAddOutputFilterByType DEFLATE font/ttfAddOutputFilterByType DEFLATE image/svg+xmlAddOutputFilterByType DEFLATE image/x-iconAddOutputFilterByType DEFLATE text/cssAddOutputFilterByType DEFLATE...