diff --git a/templates.py b/templates.py
index 47ff170..2ebabff 100644
--- a/templates.py
+++ b/templates.py
@@ -121,6 +121,14 @@ def update_message(answers: Path) -> str:
     return f"chore({scope}): update template to {ref}" if ref else f"chore({scope}): update template"
 
 
+def refresh_locks(part: str) -> None:
+    root = Path(part) if Path(part, "Makefile").is_file() else Path()
+    if (root / "uv.lock").is_file():
+        subprocess.run(["uv", "lock", "-q"], cwd=root, check=True)
+    if (root / "bun.lock").is_file():
+        subprocess.run(["bun", "install", "--silent"], cwd=root, check=True)
+
+
 def update(args: argparse.Namespace) -> None:
     answers = sorted(Path(".copier").glob("*.yml"))
     if args.parts:
@@ -132,6 +140,7 @@ def update(args: argparse.Namespace) -> None:
     for file in answers:
         run_update(".", answers_file=str(file), unsafe=True, overwrite=True,
                    skip_answered=not args.ask, defaults=args.defaults, vcs_ref=REF)
+        refresh_locks(file.stem)
         if git_dirty():
             subprocess.run(["git", "add", "-A"], check=True)
             subprocess.run(["git", "commit", "-qm", update_message(file)], check=True)