diff --git a/Resources/tools/update_version.py b/Resources/tools/update_version.py
new file mode 100644
index 00000000..e36cb16a
--- /dev/null
+++ b/Resources/tools/update_version.py
@@ -0,0 +1,57 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
+"""Utility to create a version-update branch for the Addon Manager.
+
+Given a branch name (e.g. "dev"), this script checks out that branch, pulls the
+latest changes, creates a new branch named "updateVersionYYYYMMDD<branchname>",
+updates the version and date in package.xml to today, and commits the change.
+"""
+
+import argparse
+import datetime
+import pathlib
+import re
+import subprocess
+import sys
+
+PACKAGE_XML = pathlib.Path(__file__).parent / "package.xml"
+
+
+def run_git(*arguments: str) -> None:
+    subprocess.run(["git", *arguments], cwd=PACKAGE_XML.parent, check=True)
+
+
+def update_package_xml(version: str, date: str) -> None:
+    original = PACKAGE_XML.read_text(encoding="utf-8")
+    updated = re.sub(
+        r"<version>[^<]*</version>", f"<version>{version}</version>", original, count=1
+    )
+    updated = re.sub(r"<date>[^<]*</date>", f"<date>{date}</date>", updated, count=1)
+    if updated == original:
+        raise RuntimeError("No version or date tag found in package.xml")
+    PACKAGE_XML.write_text(updated, encoding="utf-8")
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("branch", help="The branch to base the version update on")
+    branch = parser.parse_args().branch
+
+    today = datetime.date.today()
+    compact_date = today.strftime("%Y%m%d")
+    version = f"{today.year}.{today.month}.{today.day}{branch}"
+
+    run_git("checkout", branch)
+    run_git("pull")
+    run_git("checkout", "-b", f"updateVersion{compact_date}{branch}")
+    update_package_xml(version, today.isoformat())
+    run_git("add", str(PACKAGE_XML))
+    run_git("commit", "-m", f"Update {branch} to v{compact_date}")
+
+
+if __name__ == "__main__":
+    try:
+        main()
+    except (subprocess.CalledProcessError, RuntimeError) as e:
+        print(f"Error: {e}", file=sys.stderr)
+        sys.exit(1)