diff --git a/nixops/common-users.nix b/nixops/common-users.nix
index de887a5..f69f670 100644
--- a/nixops/common-users.nix
+++ b/nixops/common-users.nix
@@ -44,7 +44,7 @@
   };
   occheung = {
     isNormalUser = true;
-    extraGroups = ["plugdev" "dialout"];
+    extraGroups = ["plugdev" "dialout" "wireshark"];
     openssh.authorizedKeys.keys = [
       "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBPEvmWmxpFpMgp5fpjKud8ev0cyf/+X5fEpQt/YD/+u4mbvZYPE300DLqQ0h/qjgvaGMz1ndf4idYnRdy+plJEC/+hmlRW5NlcpAr3S/LYAisacgKToFVl+MlBo+emS9Ig=="
     ];