diff --git a/README.md b/README.md
index 472ed60..eae0072 100644
--- a/README.md
+++ b/README.md
@@ -74,7 +74,11 @@ func main() {
         return
     }
     // Get value from cell by given worksheet name and axis.
-    cell := f.GetCellValue("Sheet1", "B2")
+    cell, err := f.GetCellValue("Sheet1", "B2")
+    if err != nil {
+        fmt.Println(err)
+        return
+    }
     fmt.Println(cell)
     // Get all the rows in the Sheet1.
     rows, err := f.GetRows("Sheet1")
diff --git a/README_zh.md b/README_zh.md
index addc9f2..dfed749 100644
--- a/README_zh.md
+++ b/README_zh.md
@@ -73,7 +73,11 @@ func main() {
         return
     }
     // 获取工作表中指定单元格的值
-    cell := f.GetCellValue("Sheet1", "B2")
+    cell, err := f.GetCellValue("Sheet1", "B2")
+    if err != nil {
+        fmt.Println(err)
+        return
+    }
     fmt.Println(cell)
     // 获取 Sheet1 上所有单元格
     rows, err := f.GetRows("Sheet1")