diff --git a/index.js b/index.js
index c6419021..3d197710 100644
--- a/index.js
+++ b/index.js
@@ -47,7 +47,7 @@ const G_ATTS = ['id'];
 
 const CIRCLE_ATTS = ['cx', 'cy', 'r'];
 const PATH_ATTS = ['d'];
-const RECT_ATTS = ['width', 'height'];
+const RECT_ATTS = ['width', 'height', 'rx', 'ry'];
 const LINE_ATTS = ['x1', 'y1', 'x2', 'y2'];
 const LINEARG_ATTS = LINE_ATTS.concat(['id', 'gradientUnits']);
 const RADIALG_ATTS = CIRCLE_ATTS.concat(['id', 'gradientUnits']);