diff --git a/src/Core/Billing/Entities/ProviderInvoiceItem.cs b/src/Core/Billing/Entities/ProviderInvoiceItem.cs
index 2018e4288f..a9b9e26f58 100644
--- a/src/Core/Billing/Entities/ProviderInvoiceItem.cs
+++ b/src/Core/Billing/Entities/ProviderInvoiceItem.cs
@@ -2,6 +2,8 @@
 using Bit.Core.Entities;
 using Bit.Core.Utilities;
 
+#nullable enable
+
 namespace Bit.Core.Billing.Entities;
 
 public class ProviderInvoiceItem : ITableObject<Guid>
@@ -9,13 +11,13 @@ public class ProviderInvoiceItem : ITableObject<Guid>
     public Guid Id { get; set; }
     public Guid ProviderId { get; set; }
     [MaxLength(50)]
-    public string InvoiceId { get; set; }
+    public string InvoiceId { get; set; } = null!;
     [MaxLength(50)]
-    public string InvoiceNumber { get; set; }
+    public string? InvoiceNumber { get; set; }
     [MaxLength(50)]
-    public string ClientName { get; set; }
+    public string ClientName { get; set; } = null!;
     [MaxLength(50)]
-    public string PlanName { get; set; }
+    public string PlanName { get; set; } = null!;
     public int AssignedSeats { get; set; }
     public int UsedSeats { get; set; }
     public decimal Total { get; set; }
diff --git a/src/Core/Billing/Entities/ProviderPlan.cs b/src/Core/Billing/Entities/ProviderPlan.cs
index 114048057b..fd131f64e6 100644
--- a/src/Core/Billing/Entities/ProviderPlan.cs
+++ b/src/Core/Billing/Entities/ProviderPlan.cs
@@ -2,6 +2,8 @@
 using Bit.Core.Entities;
 using Bit.Core.Utilities;
 
+#nullable enable
+
 namespace Bit.Core.Billing.Entities;
 
 public class ProviderPlan : ITableObject<Guid>