diff --git a/src/generate_images.py b/src/generate_images.py
index 8926477..f1b69b3 100644
--- a/src/generate_images.py
+++ b/src/generate_images.py
@@ -68,6 +68,8 @@ def generate_concat(images, dest):
     for img in images:
         content += f"\nfile {img}\nduration 8"
 
+    content += "\nfile "+images[-1]
+
     with open(dest, "w") as f:
         f.write(content)
 
@@ -103,12 +105,12 @@ if __name__ == "__main__":
 
     generate_images(sys.argv[1], sys.argv[2])
     img_dir = os.path.dirname(sys.argv[2])
-    images = [
+    images = sorted([
         img for img in os.listdir(img_dir) if img.startswith(os.path.basename(sys.argv[2])) and img.endswith(".png") and "short" not in img
-    ]
-    short_images = [
+    ])
+    short_images = sorted([
         img for img in os.listdir(img_dir) if img.startswith(os.path.basename(sys.argv[2])) and img.endswith(".png") and "short" in img
-    ]
+    ])
     adjust_images([
         os.path.join(img_dir, img) for img in images
     ])