1diff --git a/src/Main.ts b/src/Main.ts
 2index f364852..76d91c0 100644
 3--- a/src/Main.ts
 4+++ b/src/Main.ts
 5@@ -2,4 +2,4 @@ import { Sheet } from "./Sheet"
 6 
 7 var sheet = new Sheet();
 8 sheet.load();
 9-sheet.toString();
10\ No newline at end of file
11+sheet.toString();
12diff --git a/src/Sheet.ts b/src/Sheet.ts
13index dd218e9..7c3bbce 100644
14--- a/src/Sheet.ts
15+++ b/src/Sheet.ts
16@@ -99,11 +99,11 @@ var Sheet = (function () {
17               allDependencies.push(refId);
18 
19               var item = this.getItem(new A1CellKey(refId));
20-              if (item.deps.length) {
21+              if (item.dependencies.length) {
22                 getTotalDependencies(refId);
23               }
24             }
25-          });
26+          }.bind(this));
27         }
28       }.bind(this);
29       getTotalDependencies(id);
30@@ -451,8 +451,8 @@ var Sheet = (function () {
31       // instance.matrix.updateCellItem(new A1CellKey(origin), {deps: [cell]});
32       instance.matrix.getItem(new A1CellKey(origin)).updateDependencies([cell]);
33       // check references error
34-      if (item && item.deps) {
35-        if (item.deps.indexOf(cell) !== -1) {
36+      if (item && item.dependencies) {
37+        if (item.dependencies.indexOf(cell) !== -1) {
38           throw Error('REF');
39         }
40       }