diff --git a/_nixos-version b/_nixos-version
index ece1b08..4a30e82 100644
--- a/_nixos-version
+++ b/_nixos-version
@@ -4,4 +4,4 @@
 _nix-common-options
 
 _arguments \
-  '(- *)'{--hash,--revision}'[Print only the git hash of the channel]'\
+  '(- *)'{--hash,--revision,--configuration-revision,--json}'[Print only the git hash of the channel]'\