diff --git a/Source/VaultSharp.Extensions.Configuration/VaultConfigurationProvider.cs b/Source/VaultSharp.Extensions.Configuration/VaultConfigurationProvider.cs
index 23ed6e8..4d178bf 100644
--- a/Source/VaultSharp.Extensions.Configuration/VaultConfigurationProvider.cs
+++ b/Source/VaultSharp.Extensions.Configuration/VaultConfigurationProvider.cs
@@ -176,7 +176,18 @@ private void SetData<TValue>(IEnumerable<KeyValuePair<string, TValue>> data, str
                 var nestedKey = string.IsNullOrEmpty(key) ? pair.Key : $"{key}:{pair.Key}";
                 nestedKey = this.ReplaceTheAdditionalCharactersForConfigurationPath(nestedKey);
 
-                var nestedValue = (JsonElement)(object)pair.Value!;
+                JsonElement nestedValue;
+
+                if (pair.Value == null)
+                {
+                    using var doc = JsonDocument.Parse("null");
+                    nestedValue = doc.RootElement.Clone();
+                }
+                else
+                {
+                    nestedValue = (JsonElement)(object)pair.Value!;
+                }
+
                 this.SetItemData(nestedKey, nestedValue);
             }
         }