diff --git a/usr/lib/python3.8/vmmgr/vmmgr.py b/usr/lib/python3.8/vmmgr/vmmgr.py
index f79045f..0441b4f 100644
--- a/usr/lib/python3.8/vmmgr/vmmgr.py
+++ b/usr/lib/python3.8/vmmgr/vmmgr.py
@@ -200,7 +200,8 @@ def install_app(app_name, queue):
     for container in new_containers:
         required_images.extend(repo_online.get_image(container['image'])['layers'])
     local_images = repo_local.get_images()
-    for layer in set(required_images):
+    # Layers need to be downloaded in correct order
+    for layer in list(dict.fromkeys(required_images)):
         if layer not in local_images:
             queue.download_image(Image(layer, False))
     queue.install_app(App(app_name, False, False))
@@ -221,7 +222,8 @@ def update_app(app_name, queue):
     for container in new_containers:
         required_images.extend(repo_online.get_image(container['image'])['layers'])
     local_images = repo_local.get_images()
-    for layer in set(required_images):
+    # Layers need to be downloaded in correct order
+    for layer in list(dict.fromkeys(required_images)):
         if layer not in local_images:
             queue.download_image(Image(layer, False))
     app = App(app_name, False)