diff --git a/table.go b/table.go
index 15ebd87..947e083 100644
--- a/table.go
+++ b/table.go
@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"image/color"
 	"math"
+	"sync"
 
 	"github.com/fogleman/gg"
 )
@@ -39,6 +40,7 @@ type TableConfig struct {
 }
 
 type TableGenerator struct {
+	lock   sync.RWMutex
 	config *TableConfig
 	dc     *gg.Context
 }
@@ -279,6 +281,8 @@ func (g *TableGenerator) drawTitle(dc *gg.Context, margin, tableWidth float64, t
 
 // 生成自适应表格（高清版本）
 func (g *TableGenerator) Generate(data *TableData, filename string) error {
+	g.lock.Lock()
+	defer g.lock.Unlock()
 	// 先创建一个临时上下文来测量文本
 	tempDC := gg.NewContext(1, 1)
 	if err := g.loadHDFont(tempDC, g.config.FontSize); err != nil {