diff --git a/public/javascripts/vector-render.js b/public/javascripts/vector-render.js
index add2a7b..77ffe24 100644
--- a/public/javascripts/vector-render.js
+++ b/public/javascripts/vector-render.js
@@ -23,6 +23,9 @@ function vec2_angle(v) {
 function render_vector_drawing(a, padding) {
   var shape = a.shape || "";
   var path = [];
+  if(typeof a.control_points == 'string'){
+    a.control_points = JSON.parse(a.control_points);
+  }
   var p = a.control_points[0];
 
   if (!p) return "";