diff --git a/themes/tiddlywiki/vanilla/base.tid b/themes/tiddlywiki/vanilla/base.tid
index e83cc86b9..28188ec3e 100644
--- a/themes/tiddlywiki/vanilla/base.tid
+++ b/themes/tiddlywiki/vanilla/base.tid
@@ -135,7 +135,7 @@ h1 {
 
 h1, h2, h3, h4, h5, h6 {
 	line-height: 1.2;
-	font-weight: 300;
+	font-weight: normal;
 }
 
 pre {
@@ -340,7 +340,7 @@ table tfoot tr td {
 button.tc-tiddlylink,
 a.tc-tiddlylink {
 	text-decoration: none;
-	font-weight: 500;
+	font-weight: bold;
 	color: <<colour tiddler-link-foreground>>;
 	-webkit-user-select: inherit; /* Otherwise the draggable attribute makes links impossible to select */
 }
@@ -726,7 +726,7 @@ button.tc-tag-label, span.tc-tag-label {
 	display: inline-block;
 	padding: 0.16em 0.7em;
 	font-size: 0.9em;
-	font-weight: 400;
+	font-weight: normal;
 	line-height: 1.2em;
 	color: <<colour tag-foreground>>;
 	white-space: nowrap;
@@ -836,7 +836,7 @@ button.tc-btn-invisible.tc-remove-tag-button {
 }
 
 .tc-sidebar-header .tc-title a.tc-tiddlylink-resolves {
-	font-weight: 300;
+	font-weight: normal;
 }
 
 .tc-sidebar-header .tc-sidebar-lists p {
@@ -1044,7 +1044,7 @@ button.tc-btn-invisible.tc-remove-tag-button {
 	width: 1%; /* Makes this column be as narrow as possible */
 	text-align: right;
 	font-style: italic;
-	font-weight: 200;
+	font-weight: normal;
 }
 
 .tc-view-field-value {
@@ -1084,7 +1084,7 @@ button.tc-btn-invisible.tc-remove-tag-button {
 
 .tc-site-title,
 .tc-titlebar {
-	font-weight: 300;
+	font-weight: normal;
 	font-size: 2.35em;
 	line-height: 1.35em;
 	color: <<colour tiddler-title-foreground>>;
@@ -1116,7 +1116,7 @@ button.tc-btn-invisible.tc-remove-tag-button {
 .tc-subtitle {
 	font-size: 0.9em;
 	color: <<colour tiddler-subtitle-foreground>>;
-	font-weight: 300;
+	font-weight: normal;
 }
 
 .tc-subtitle .tc-tiddlylink {
@@ -1580,7 +1580,7 @@ html body.tc-body.tc-single-tiddler-window {
 	justify-content: center;
 	background-color: <<color background>>;
 	border: 4px dashed <<color modal-border>>;
-	font-weight: 600;
+	font-weight: bold;
 	font-size: 150%;
 	opacity: 0.8;
 	color: <<color foreground>>;
@@ -2011,7 +2011,7 @@ html body.tc-body.tc-single-tiddler-window {
 	color: <<colour tab-foreground>>;
 	padding: 3px 5px 3px 5px;
 	margin-right: 0.3em;
-	font-weight: 300;
+	font-weight: normal;
 	border: none;
 	background: inherit;
 	background-color: <<colour tab-background>>;
@@ -2692,13 +2692,13 @@ input.tc-palette-manager-colour-input {
 
 .tc-table-of-contents li li li {
 	font-size: 0.95em;
-	font-weight: 200;
+	font-weight: normal;
 	line-height: 1.5;
 }
 
 .tc-table-of-contents li li li li {
 	font-size: 0.95em;
-	font-weight: 200;
+	font-weight: normal;
 }
 
 .tc-tabbed-table-of-contents {
diff --git a/themes/tiddlywiki/vanilla/settings.multids b/themes/tiddlywiki/vanilla/settings.multids
index 8db5be53d..26c9bb9de 100644
--- a/themes/tiddlywiki/vanilla/settings.multids
+++ b/themes/tiddlywiki/vanilla/settings.multids
@@ -1,6 +1,6 @@
 title: $:/themes/tiddlywiki/vanilla/settings/
 
-fontfamily: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji"
+fontfamily: -apple-system,BlinkMacSystemFont,Segoe UI,Helvetica,Arial,sans-serif,Apple Color Emoji,Segoe UI Emoji;
 codefontfamily: "SFMono-Regular",Consolas,"Liberation Mono",Menlo,Courier,monospace
 backgroundimageattachment: fixed
 backgroundimagesize: auto