diff --git a/src/Core/Models/Api/Request/CipherRequestModel.cs b/src/Core/Models/Api/Request/CipherRequestModel.cs
index c167211d33..b0fa74df7f 100644
--- a/src/Core/Models/Api/Request/CipherRequestModel.cs
+++ b/src/Core/Models/Api/Request/CipherRequestModel.cs
@@ -184,7 +184,7 @@ namespace Bit.Core.Models.Api
         public string FolderId { get; set; }
     }
 
-    public class CipherBulkShareRequestModel
+    public class CipherBulkShareRequestModel : IValidatableObject
     {
         [Required]
         public IEnumerable<string> CollectionIds { get; set; }