diff --git a/nushell/config.nu b/nushell/config.nu
index 6f76bd6..b2abf8a 100644
--- a/nushell/config.nu
+++ b/nushell/config.nu
@@ -135,7 +135,11 @@ def _update_args [] {
 }
 
 def u [arg?: string@_update_args] {
-    ^update $arg
+    if $arg == null {
+        ^update
+    } else {
+        ^update $arg
+    }
 }
 
 # gclone aliases