diff --git a/devshell.toml b/devshell.toml
index a82e37d..908ecfb 100644
--- a/devshell.toml
+++ b/devshell.toml
@@ -8,3 +8,7 @@ packages = [
 [[commands]]
 package = "treefmt"
 category = "formatter"
+
+[[commands]]
+name = "update_lockfile"
+command = "deno cache --import-map=./import_map.json --lock lock.json --lock-write ./mod.ts"