diff --git a/src/OrchardCore.Modules/OrchardCore.Placements/Models/PlacementsDocument.cs b/src/OrchardCore.Modules/OrchardCore.Placements/Models/PlacementsDocument.cs
index 5ceab7e13c9..98412581b48 100644
--- a/src/OrchardCore.Modules/OrchardCore.Placements/Models/PlacementsDocument.cs
+++ b/src/OrchardCore.Modules/OrchardCore.Placements/Models/PlacementsDocument.cs
@@ -7,6 +7,6 @@ namespace OrchardCore.Placements.Models
 {
     public class PlacementsDocument : Document
     {
-        public Dictionary<string, PlacementNode[]> Placements { get; } = new Dictionary<string, PlacementNode[]>(StringComparer.OrdinalIgnoreCase);
+        public Dictionary<string, PlacementNode[]> Placements { get; init; } = new(StringComparer.OrdinalIgnoreCase);
     }
 }