diff --git a/lib/i3status-rust.nix b/lib/i3status-rust.nix
index 10df946..3393286 100644
--- a/lib/i3status-rust.nix
+++ b/lib/i3status-rust.nix
@@ -130,7 +130,7 @@ in {
     {
       block = "time";
       interval = 1;
-      format = "%Y-%m-%d (%V %a) %H:%M";
+      format = "%Y-%m-%d (%W %a) %H:%M";
     }
   ];
 }