diff --git a/packages/block-library/src/site-title/block.json b/packages/block-library/src/site-title/block.json
index a91a601b87d09..26ee7c601f107 100644
--- a/packages/block-library/src/site-title/block.json
+++ b/packages/block-library/src/site-title/block.json
@@ -29,6 +29,8 @@
 		"fontSize": true,
 		"lineHeight": true,
 		"__experimentalFontFamily": true,
-		"__experimentalTextTransform": true
+		"__experimentalTextTransform": true,
+		"__experimentalFontStyle": true,
+		"__experimentalFontWeight": true
 	}
 }