diff --git a/packages/block-library/src/rss/style.scss b/packages/block-library/src/rss/style.scss
index 8607a63a63109a..3a3995cf6e384e 100644
--- a/packages/block-library/src/rss/style.scss
+++ b/packages/block-library/src/rss/style.scss
@@ -1,5 +1,8 @@
 .wp-block-rss {
-	box-sizing: border-box !important; // The important is needed because of the reset mixin on the parent: https://github.com/WordPress/gutenberg/blob/a250e9e5fe00dd5195624f96a3d924e7078951c3/packages/edit-post/src/style.scss#L54
+	// This needs extra specificity due to the reset mixin on the parent: https://github.com/WordPress/gutenberg/blob/a250e9e5fe00dd5195624f96a3d924e7078951c3/packages/edit-post/src/style.scss#L54
+	&.wp-block-rss {
+		box-sizing: border-box;
+	}
 
 	&.alignleft {
 		/*rtl:ignore*/