diff --git a/image/download.py b/image/download.py
index 20a7efb..c313424 100755
--- a/image/download.py
+++ b/image/download.py
@@ -32,3 +32,12 @@ with tempfile.TemporaryDirectory() as tmp:
             shutil.copytree(source, destination)
         else:
             shutil.copy2(source, destination)
+    # The upstream web bundle preloads this module with a relative URL from
+    # /app/photocraft-web.js, which incorrectly resolves under /app/snippets.
+    for script in target.rglob("*.js"):
+        contents = script.read_text()
+        fixed = contents.replace(
+            '"./snippets/', '"/snippets/'
+        )
+        if fixed != contents:
+            script.write_text(fixed)