diff --git a/framework/src/Volo.Abp.DistributedLocking.Dapr/Volo.Abp.DistributedLocking.Dapr.csproj b/framework/src/Volo.Abp.DistributedLocking.Dapr/Volo.Abp.DistributedLocking.Dapr.csproj
index 79d39eedf0..a0ddaac22e 100644
--- a/framework/src/Volo.Abp.DistributedLocking.Dapr/Volo.Abp.DistributedLocking.Dapr.csproj
+++ b/framework/src/Volo.Abp.DistributedLocking.Dapr/Volo.Abp.DistributedLocking.Dapr.csproj
@@ -5,6 +5,8 @@
 
     <PropertyGroup>
         <TargetFramework>net7.0</TargetFramework>
+        <Nullable>enable</Nullable>
+        <WarningsAsErrors>Nullable</WarningsAsErrors>
         <RootNamespace />
     </PropertyGroup>
 
diff --git a/framework/src/Volo.Abp.DistributedLocking.Dapr/Volo/Abp/DistributedLocking/Dapr/AbpDistributedLockDaprOptions.cs b/framework/src/Volo.Abp.DistributedLocking.Dapr/Volo/Abp/DistributedLocking/Dapr/AbpDistributedLockDaprOptions.cs
index a51ed8ede7..b4572441d3 100644
--- a/framework/src/Volo.Abp.DistributedLocking.Dapr/Volo/Abp/DistributedLocking/Dapr/AbpDistributedLockDaprOptions.cs
+++ b/framework/src/Volo.Abp.DistributedLocking.Dapr/Volo/Abp/DistributedLocking/Dapr/AbpDistributedLockDaprOptions.cs
@@ -4,7 +4,7 @@ namespace Volo.Abp.DistributedLocking.Dapr;
 
 public class AbpDistributedLockDaprOptions
 {
-    public string StoreName { get; set; }
+    public string StoreName { get; set; } = default!;
 
     public string? Owner { get; set; }
 
diff --git a/framework/src/Volo.Abp.DistributedLocking.Dapr/Volo/Abp/DistributedLocking/Dapr/DaprAbpDistributedLock.cs b/framework/src/Volo.Abp.DistributedLocking.Dapr/Volo/Abp/DistributedLocking/Dapr/DaprAbpDistributedLock.cs
index 974c6461a6..100fece989 100644
--- a/framework/src/Volo.Abp.DistributedLocking.Dapr/Volo/Abp/DistributedLocking/Dapr/DaprAbpDistributedLock.cs
+++ b/framework/src/Volo.Abp.DistributedLocking.Dapr/Volo/Abp/DistributedLocking/Dapr/DaprAbpDistributedLock.cs
@@ -24,7 +24,7 @@ public class DaprAbpDistributedLock : IAbpDistributedLock, ITransientDependency
         DistributedLockDaprOptions = distributedLockDaprOptions.Value;
     }
 
-    public async Task<IAbpDistributedLockHandle> TryAcquireAsync(
+    public async Task<IAbpDistributedLockHandle?> TryAcquireAsync(
         string name,
         TimeSpan timeout = default,
         CancellationToken cancellationToken = default)