diff --git a/pkg/tdengine/tdengine_table.go b/pkg/tdengine/tdengine_table.go
index 4643d85..18b0771 100644
--- a/pkg/tdengine/tdengine_table.go
+++ b/pkg/tdengine/tdengine_table.go
@@ -29,7 +29,7 @@ func (s *TdEngine) InsertDevice(deviceKey string, data map[string]interface{}) e
 
 	for k, v := range data {
 		field = append(field, k)
-		value = append(value, kgo.KConv.ToStr(v))
+		value = append(value, fmt.Sprintf("'%s'", kgo.KConv.ToStr(v)))
 		placeholders = append(placeholders, "?")
 	}