diff --git a/photo_review/photo_review.py b/photo_review/photo_review.py
index d8677ca..c0e9bef 100644
--- a/photo_review/photo_review.py
+++ b/photo_review/photo_review.py
@@ -76,6 +76,7 @@ def split_image(img_path, max_ratio=2.82, best_ration=1.41, overlap=0.05):
                 cropped_img = cropped_img.convert("RGB")
                 split_result.append({"img": cropped_img, "x_offset": offset, "y_offset": 0})
     else:
+        img = img.convert("RGB")
         split_result.append({"img": img, "x_offset": 0, "y_offset": 0})
     return split_result