diff --git a/core/css/guest.css b/core/css/guest.css
index 4d7df8b89969e..a28152daa72fe 100644
--- a/core/css/guest.css
+++ b/core/css/guest.css
@@ -17,7 +17,8 @@ ul { list-style:none; }
 body {
 	background-color: #ffffff;
 	font-weight: normal;
-	font-size: .8em;
+	/* bring the default font size up to 15px */
+	font-size: .9375em;
 	line-height: 1.6em;
 	font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';
 	color: #000;
diff --git a/core/css/styles.scss b/core/css/styles.scss
index 30baa4b73ac15..663f00a436565 100644
--- a/core/css/styles.scss
+++ b/core/css/styles.scss
@@ -88,7 +88,8 @@ ul {
 body {
 	background-color: var(--color-main-background);
 	font-weight: normal;
-	font-size: .8em;
+	/* bring the default font size up to 15px */
+	font-size: .9375em;
 	line-height: 1.6em;
 	font-family: var(--font-face);
 	color: var(--color-main-text);