diff --git a/docs/DEVELOPER-GUIDE.md b/docs/DEVELOPER-GUIDE.md
index 5d3868d..77e9465 100644
--- a/docs/DEVELOPER-GUIDE.md
+++ b/docs/DEVELOPER-GUIDE.md
@@ -701,7 +701,7 @@ kubectl create secret generic myapp-credentials \
 
 # 2. Seal it
 kubeseal --format=yaml \
-  --cert=pub-cert.pem \
+  --namespace=myapp \
   < private/myapp-credentials.yaml \
   > secrets/myapp-credentials-sealed.yaml