diff --git a/finetune/tag_images_by_wd14_tagger.py b/finetune/tag_images_by_wd14_tagger.py
index c5767894..c543332e 100644
--- a/finetune/tag_images_by_wd14_tagger.py
+++ b/finetune/tag_images_by_wd14_tagger.py
@@ -37,7 +37,9 @@ def main(args):
 
   # 画像を読み込む
   image_paths = glob.glob(os.path.join(args.train_data_dir, "*.jpg")) + \
-      glob.glob(os.path.join(args.train_data_dir, "*.png")) + glob.glob(os.path.join(args.train_data_dir, "*.webp"))
+      glob.glob(os.path.join(args.train_data_dir, "*.png")) + \
+      glob.glob(os.path.join(args.train_data_dir, "*.webp")) + \
+      glob.glob(os.path.join(args.train_data_dir, "*.bmp"))
   print(f"found {len(image_paths)} images.")
 
   print("loading model and labels")