diff --git a/specification/web/resource-manager/Microsoft.Web/stable/2018-02-01/CommonDefinitions.json b/specification/web/resource-manager/Microsoft.Web/stable/2018-02-01/CommonDefinitions.json
index ecbefb2a6e4b..82529f996adc 100644
--- a/specification/web/resource-manager/Microsoft.Web/stable/2018-02-01/CommonDefinitions.json
+++ b/specification/web/resource-manager/Microsoft.Web/stable/2018-02-01/CommonDefinitions.json
@@ -2992,7 +2992,6 @@
               "readOnly": true
             },
             "certBlob": {
-              "format": "byte",
               "description": "A certificate file (.cer) blob containing the public key of the private key used to authenticate a \nPoint-To-Site VPN connection.",
               "type": "string"
             },