diff --git a/Dfe.PrepareConversions/Dfe.PrepareConversions.Data/Features/ApiClient.cs b/Dfe.PrepareConversions/Dfe.PrepareConversions.Data/Features/ApiClient.cs
index 5f530822b..b180371ab 100644
--- a/Dfe.PrepareConversions/Dfe.PrepareConversions.Data/Features/ApiClient.cs
+++ b/Dfe.PrepareConversions/Dfe.PrepareConversions.Data/Features/ApiClient.cs
@@ -59,9 +59,11 @@ public async Task<HttpResponseMessage> AddProjectNote(int id, AddProjectNote pro
 
    public async Task<HttpResponseMessage> SetProjectExternalApplicationForm(int id, bool externalApplicationFormSaved, string externalApplicationFormUrl)
    {
-      dynamic payload = new ExpandoObject();
-      payload.externalApplicationFormSaved = externalApplicationFormSaved;
-      payload.externalApplicationFormUrl = externalApplicationFormUrl ?? string.Empty;
+      var payload = new
+      {
+         externalApplicationFormSaved = externalApplicationFormSaved,
+         externalApplicationFormUrl = externalApplicationFormUrl ?? string.Empty
+      };
 
       return await AcademisationClient.PutAsync(string.Format(PathFor.SetExternalApplicationForm, id), JsonContent.Create(payload));
    }