diff --git a/README.md b/README.md
index 03b26042c..7b5a8b15b 100755
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ docker run \
   -v ~/.halo2:/root/.halo2 \
   halohub/halo:2.2 \
   --halo.external-url=http://localhost:8090/ \
-  --halo.security.initializer.superadminuser=admin \
+  --halo.security.initializer.superadminusername=admin \
   --halo.security.initializer.superadminpassword=P@88w0rd
 ```