diff --git a/VDS/Protocols/FormFieldable.swift b/VDS/Protocols/FormFieldable.swift
index 41017204..52deef7e 100644
--- a/VDS/Protocols/FormFieldable.swift
+++ b/VDS/Protocols/FormFieldable.swift
@@ -8,6 +8,7 @@
 import Foundation
 
 public protocol FormFieldable {
+    associatedtype ValueType
     var inputId: String? { get set }
-    var value: AnyHashable? { get set }
+    var value: ValueType? { get set }
 }