diff --git a/docs/_includes/backers.md b/docs/_includes/backers.md
index ccf561abfa..5b8ad63b5e 100644
--- a/docs/_includes/backers.md
+++ b/docs/_includes/backers.md
@@ -3,4 +3,4 @@
 Find Mocha helpful?  Become a [backer](https://opencollective.com/mochajs#support) and support Mocha with a monthly donation. 
 
 {: id="_backers" }
-{% for i in (0..29) %}[![](//opencollective.com/mochajs/backer/{{ i }}/avatar){: onload="window.avatars.backerLoaded()" }](https://opencollective.com/mochajs/backer/{{ i }}/website){: target="_blank"} {% endfor %}
+{% for i in (0..29) %}[![](//opencollective.com/mochajs/backer/{{ i }}/avatar.jpg)](https://opencollective.com/mochajs/backer/{{ i }}/website){: target="_blank" rel="noopener"}{% endfor %}
diff --git a/docs/_includes/sponsors.md b/docs/_includes/sponsors.md
index 5fe0c7d9c1..cd5331637c 100644
--- a/docs/_includes/sponsors.md
+++ b/docs/_includes/sponsors.md
@@ -3,4 +3,4 @@
 Use Mocha at Work?  Ask your manager or marketing team if they'd help [support](https://opencollective.com/mochajs#support) our project.  Your company's logo will also be displayed on [npmjs.com](http://npmjs.com/package/mocha) and our [GitHub repository](https://github.com/mochajs/mocha#sponsors).
 
 {: id="_sponsors" }
-{% for i in (0..29) %}[![](//opencollective.com/mochajs/sponsor/{{ i }}/avatar){: onload="window.avatars.sponsorLoaded()" }](https://opencollective.com/mochajs/sponsor/{{ i }}/website){: target="_blank"} {% endfor %}
+{% for i in (0..29) %}[![](//opencollective.com/mochajs/sponsor/{{ i }}/avatar.jpg){: onload="window.avatars.sponsorLoaded()" }](https://opencollective.com/mochajs/sponsor/{{ i }}/website){: target="_blank"} {% endfor %}