diff --git a/cmd/osm-bootstrap/crds/config_meshconfig.yaml b/cmd/osm-bootstrap/crds/config_meshconfig.yaml
index e6a7bc6881..1f64259468 100644
--- a/cmd/osm-bootstrap/crds/config_meshconfig.yaml
+++ b/cmd/osm-bootstrap/crds/config_meshconfig.yaml
@@ -194,6 +194,7 @@ spec:
                           type: array
                           items:
                             type: string
+                          minItems: 1
                         validityDuration:
                           description: Certificate validity duration, represented as a sequence of decimal numbers each with optional fraction and a unit suffix
                           type: string