diff --git a/packages/block-library/src/post-time-to-read/block.json b/packages/block-library/src/post-time-to-read/block.json
index d19c6e553046c..ce0ab2be6c02f 100644
--- a/packages/block-library/src/post-time-to-read/block.json
+++ b/packages/block-library/src/post-time-to-read/block.json
@@ -45,6 +45,12 @@
 		},
 		"interactivity": {
 			"clientNavigation": true
+		},
+		"__experimentalBorder": {
+			"radius": true,
+			"color": true,
+			"width": true,
+			"style": true
 		}
 	}
 }