diff --git a/charts/ingress-nginx/values.yaml b/charts/ingress-nginx/values.yaml
index a731fbcc7..5fd3c82cd 100644
--- a/charts/ingress-nginx/values.yaml
+++ b/charts/ingress-nginx/values.yaml
@@ -624,7 +624,7 @@ controller:
             # self-signed root certificate
             rootCert:
                 # default to be 5y
-                duration:
+                duration: ""
             admissionCert:
                 # default to be 1y
                 duration: ""