diff --git a/merge_images.py b/merge_images.py
index aba6687..d64b48e 100644
--- a/merge_images.py
+++ b/merge_images.py
@@ -10,6 +10,7 @@ per_image_height = 320
 cols = 2
 
 images = list(Path("./export/").glob("*.png"))
+images.sort()
 image_count = len(images)
 total_image_height = image_count / cols * per_image_height
 if image_count / cols * per_image_height > total_image_height: