Use a CDN for all static assets: 56/100

https://www.webpagetest.org/performance_optimization.php?test=180326_W8_0e680d34d87aaecfa1e0f8ed75840c1b&run=2#use_of_cdn

FAILED - https://www.verhuisbedrijf-almelo.nl/wp-content/plugins/wp-hummingbird/admin/assets/css/critical.css?ver=4.9.4
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-includes/js/jquery/jquery.js?ver=1.12.4
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-includes/js/jquery/jquery-migrate.min.js?ver=1.4.1
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-content/plugins/duracelltomi-google-tag-manager/js/gtm4wp-outbound-click-tracker.js?ver=1.7.2
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-content/plugins/duracelltomi-google-tag-manager/js/gtm4wp-download-tracker.js?ver=1.7.2
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-content/plugins/duracelltomi-google-tag-manager/js/gtm4wp-email-link-tracker.js?ver=1.7.2
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-content/plugins/duracelltomi-google-tag-manager/js/gtm4wp-form-move-tracker.js?ver=1.7.2
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-content/plugins/duracelltomi-google-tag-manager/js/gtm4wp-social-tracker.js?ver=1.7.2
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-content/plugins/duracelltomi-google-tag-manager/js/analytics-talk-content-tracking.js?ver=1.7.2
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-content/themes/enfold/js/avia-compat.js?ver=4.2
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-includes/js/mediaelement/mediaelement-and-player.min.js?ver=4.2.6-78496d1
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-content/themes/enfold/css/grid.css?ver=4.2
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-includes/js/mediaelement/mediaelement-migrate.min.js?ver=4.9.4
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-includes/js/mediaelement/wp-mediaelement.min.js?ver=4.9.4
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-includes/js/comment-reply.min.js?ver=4.9.4
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-content/themes/enfold/js/avia.js?ver=4.2
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-content/themes/enfold/js/shortcodes.js?ver=4.2
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-content/uploads/2018/03/logo-verhuisbedrijf-almelo.jpg
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-content/uploads/2017/11/verhuisbedrijf-engelbertink-1500x400.png
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-content/themes/enfold/js/aviapopup/jquery.magnific-popup.min.js?ver=4.2
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-includes/js/wp-embed.min.js?ver=4.9.4
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-content/themes/enfold/config-templatebuilder/avia-template-builder/assets/fonts/entypo-fontello.woff?v=3
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-content/uploads/2017/11/verhuisbedrijf-engelbertink-4-1500x430.png
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-content/uploads/2017/11/verhuisbedrijf-engelbertink-2-1500x430.png
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-content/uploads/2017/11/verhuisbedrijf-engelbertink-3-1500x430.png
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-includes/js/wp-emoji-release.min.js?ver=4.9.4
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-content/themes/enfold/css/print.css?ver=4.2
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-content/themes/enfold/css/base.css?ver=4.2
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-content/themes/enfold/css/layout.css?ver=4.2
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-content/themes/enfold/css/shortcodes.css?ver=4.2
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-content/themes/enfold/js/aviapopup/magnific-popup.css?ver=4.2
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-content/uploads/dynamic_avia/enfold.css?ver=5ab4eeffe055b
FAILED - https://www.verhuisbedrijf-almelo.nl/wp-content/themes/enfold/css/custom.css?ver=4.2

CDN's Used:
http://www.verhuisbedrijf-almelo.nl :
fonts.googleapis.com : Google
fonts.gstatic.com : Google
http://www.googletagmanager.com : Google
connect.facebook.net : Facebook
platform.twitter.com : Edgecast
http://www.google-analytics.com : Google
http://www.googleadservices.com : Google
http://www.facebook.com : Facebook
staticxx.facebook.com : Facebook
syndication.twitter.com : Twitter
googleads.g.doubleclick.net : Google
http://www.google.com : Google
scontent-iad3-1.xx.fbcdn.net : Facebook

I have activated CDN network throug WP MUDEV.... Stil i get these alerts