diff --git a/assets/_scss/_header_additional-class.scss b/assets/_scss/_header_additional-class.scss
index 3e254c7..a0c6e27 100644
--- a/assets/_scss/_header_additional-class.scss
+++ b/assets/_scss/_header_additional-class.scss
@@ -1,10 +1,6 @@
 .site-logo--set {
 	display: grid;
 
-	.wp-block-site-title {
-		font-size: clamp(12px, calc((100vw - 360px) * (10 / (1200 - 360)) + 12px), 22px);
-	}
-
 	.wp-block-site-tagline {
 		line-height: 1.4;
 		font-size: clamp(10px, calc((100vw - 360px) * (4 / (1200 - 360)) + 10px), 14px);
diff --git a/theme.json b/theme.json
index 3d5f12f..10f20d1 100644
--- a/theme.json
+++ b/theme.json
@@ -317,7 +317,8 @@
 			"core/site-title": {
 				"typography": {
 					"fontWeight": "700",
-					"lineHeight": "var(--wp--custom--typography--line-height--heading)"
+					"lineHeight": "var(--wp--custom--typography--line-height--heading)",
+					"fontSize": "clamp(12px, calc((100vw - 360px) * (10 / (1200 - 360)) + 12px), 22px)"
 				},
 				"elements": {
 					"link": {