diff --git a/plugins/jquery-filters.php b/plugins/jquery-filters.php
index 734810e3..b7edbda8 100644
--- a/plugins/jquery-filters.php
+++ b/plugins/jquery-filters.php
@@ -88,6 +88,10 @@
 	return 1024 * 1024;
 } );
 
+// Disable the new image sizes feature.
+// It adds a style tag that would require a CSP exception.
+add_filter( 'wp_img_tag_add_auto_sizes', '__return_false' );
+
 // Allow full HTML in term descriptions.
 add_action( 'init', 'jquery_unfiltered_html_for_term_descriptions' );
 add_action( 'set_current_user', 'jquery_unfiltered_html_for_term_descriptions' );