diff --git a/configs/ppyolo/_base_/ppyolov2_reader.yml b/configs/ppyolo/_base_/ppyolov2_reader.yml
index 7472531315d13425d082ad571d3015b2a08faebb..d8a96dae22340a47b8df069fcda5a3ba91296090 100644
--- a/configs/ppyolo/_base_/ppyolov2_reader.yml
+++ b/configs/ppyolo/_base_/ppyolov2_reader.yml
@@ -1,4 +1,4 @@
-worker_num: 8
+worker_num: 2
 TrainReader:
   inputs_def:
     num_max_boxes: 100