diff --git a/framework/src/Volo.Abp.Gdpr.Abstractions/Volo.Abp.Gdpr.Abstractions.csproj b/framework/src/Volo.Abp.Gdpr.Abstractions/Volo.Abp.Gdpr.Abstractions.csproj
index 412f2f38e4..5bc6664db0 100644
--- a/framework/src/Volo.Abp.Gdpr.Abstractions/Volo.Abp.Gdpr.Abstractions.csproj
+++ b/framework/src/Volo.Abp.Gdpr.Abstractions/Volo.Abp.Gdpr.Abstractions.csproj
@@ -5,6 +5,8 @@
 
     <PropertyGroup>
         <TargetFrameworks>netstandard2.0;netstandard2.1;net7.0</TargetFrameworks>
+        <Nullable>enable</Nullable>
+        <WarningsAsErrors>Nullable</WarningsAsErrors>
         <RootNamespace />
     </PropertyGroup>
     
diff --git a/framework/src/Volo.Abp.Gdpr.Abstractions/Volo/Abp/Gdpr/GdprUserDataPreparedEto.cs b/framework/src/Volo.Abp.Gdpr.Abstractions/Volo/Abp/Gdpr/GdprUserDataPreparedEto.cs
index 3a2c440f97..d52e12783c 100644
--- a/framework/src/Volo.Abp.Gdpr.Abstractions/Volo/Abp/Gdpr/GdprUserDataPreparedEto.cs
+++ b/framework/src/Volo.Abp.Gdpr.Abstractions/Volo/Abp/Gdpr/GdprUserDataPreparedEto.cs
@@ -7,7 +7,7 @@ public class GdprUserDataPreparedEto
 {
     public Guid RequestId { get; set; }
 
-    public string Provider { get; set; }
+    public string Provider { get; set; } = default!;
     
-    public GdprDataInfo Data { get; set; }
+    public GdprDataInfo Data { get; set; } = default!;
 }
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