diff --git a/README.md b/README.md
index f25d5ccd..5483eb78 100644
--- a/README.md
+++ b/README.md
@@ -202,6 +202,10 @@ releases:
     # It may be helpful to deploy charts with helm api v1 CRDS
     # https://github.com/roboll/helmfile/pull/1373
     disableValidation: false
+    # passes --disable-validation to helm 3 diff plugin, this requires diff plugin >= 3.1.2
+    # It is useful when any release contains custom resources for CRDs that is not yet installed onto the cluster.
+    # https://github.com/roboll/helmfile/pull/1618
+    disableValidationOnInstall: false
     # passes --disable-openapi-validation to helm 3 diff plugin, this requires diff plugin >= 3.1.2
     # It may be helpful to deploy charts with helm api v1 CRDS
     # https://github.com/roboll/helmfile/pull/1373