         }
         //request.timeoutInterval = 60
         request.setValue("application/json", forHTTPHeaderField: "Content-Type")
-        
+        request.setValue(BLUESNAP_VERSION_HEADER_VAL, forHTTPHeaderField: BLUESNAP_VERSION_HEADER)
+
         // fire request
         
         var resultError: BSErrors?

    internal static let PAYPAL_SERVICE = "services/2/tokenized-services/paypal-token?amount="
    internal static let PAYPAL_SHIPPING = "&req-confirm-shipping=0&no-shipping=2"
    internal static let TOKENIZED_SERVICE = "services/2/payment-fields-tokens/"

    
    /**
     Fetch all the initial data required for the SDK from BlueSnap server:

        var request = NSMutableURLRequest(url: url as URL)
        request.setValue("application/json", forHTTPHeaderField: "Content-Type")
        request.setValue(bsToken!.tokenStr, forHTTPHeaderField: "Token-Authentication")
        request.setValue(BLUESNAP_VERSION_HEADER_VAL, forHTTPHeaderField: BLUESNAP_VERSION_HEADER)

        // fire request
        
        var resultToken: String?
