diff --git a/pywebpack/bundle.py b/pywebpack/bundle.py
index d4905f6..bdc0afc 100644
--- a/pywebpack/bundle.py
+++ b/pywebpack/bundle.py
@@ -2,6 +2,7 @@
 #
 # This file is part of PyWebpack
 # Copyright (C) 2017 CERN.
+# Copyright (C) 2025 Graz University of Technology.
 #
 # PyWebpack is free software; you can redistribute it and/or modify
 # it under the terms of the Revised BSD License; see LICENSE file for
@@ -22,6 +23,7 @@ def __init__(
         peerDependencies=None,
         aliases=None,
         copy=None,
+        scripts=None,
     ):
         """Initialize webpack bundle.
 
@@ -37,6 +39,7 @@ def __init__(
             ``{"from": "source_path", "to": "dest_path"}`` for copying assets.
             Paths are relative to the directory of the resulting config.
         """
+        self.scripts = scripts
         self.path = path
         self.entry = entry or {}
         self.dependencies = {
diff --git a/pywebpack/project.py b/pywebpack/project.py
index ffbd820..3177caa 100644
--- a/pywebpack/project.py
+++ b/pywebpack/project.py
@@ -3,6 +3,7 @@
 # This file is part of PyWebpack
 # Copyright (C) 2017-2020 CERN.
 # Copyright (C) 2020 Cottage Labs LLP.
+# Copyright (C) 2025 Graz University of Technology.
 #
 # PyWebpack is free software; you can redistribute it and/or modify
 # it under the terms of the Revised BSD License; see LICENSE file for
@@ -350,14 +351,26 @@ def dependencies(self):
                 raise MergeConflictError(new_msg)
         return res
 
+    @property
+    @cached
+    def scripts(self):
+        """Get scripts."""
+        res = {}
+        for b in self.bundles:
+            if b.scripts:
+                res.update(b.scripts)
+        return res
+
     @property
     @cached
     def package_json(self):
-        """Merge bundle dependencies into ``package.json``."""
+        """Merge bundle configuration into ``package.json``."""
         # Reads package.json from the project_template_dir and merges in
         # bundle dependencies. Note, that package.json is not symlinked
         # because then we risk changing the source package.json automatically.
-        return merge_deps(self.package_json_source, self.dependencies)
+        package_json = merge_deps(self.package_json_source, self.dependencies)
+        package_json["scripts"].update(self.scripts)
+        return package_json
 
     def collect(self, force=None):
         """Collect asset files from bundles."""
diff --git a/pywebpack/storage.py b/pywebpack/storage.py
index 01415b4..68b27eb 100644
--- a/pywebpack/storage.py
+++ b/pywebpack/storage.py
@@ -2,6 +2,7 @@
 #
 # This file is part of PyWebpack
 # Copyright (C) 2017 CERN.
+# Copyright (C) 2025 Graz University of Technology.
 #
 # PyWebpack is free software; you can redistribute it and/or modify
 # it under the terms of the Revised BSD License; see LICENSE file for
@@ -16,6 +17,9 @@
 
 def iter_files(folder):
     """Iterate all files in a given root directory."""
+    if folder is None:
+        return
+
     for root, dirnames, filenames in walk(folder):
         for f in filenames:
             f = join(root, f)
@@ -27,6 +31,9 @@ def iter_paths(folder, root=None, depth=None):
     assert depth is None or depth >= 0
     root = root or folder  # needed to compute the relative name
 
+    if folder is None:
+        return
+
     if depth is None:  # yield all paths
         for result in iter_files(folder):
             yield result