diff --git a/themes/quark-open-publishing/css/custom.css b/themes/quark-open-publishing/css/custom.css
index 99cb34e5..3cf24cca 100644
--- a/themes/quark-open-publishing/css/custom.css
+++ b/themes/quark-open-publishing/css/custom.css
@@ -6,7 +6,7 @@
 	padding-right: .5em;
 	padding-bottom: 1.5em;
 	margin-bottom: 3em;
-	max-width: 30%;
+	max-width: 30vw;
 }
 
 .upcoming_events > h3 {