diff --git a/framework/src/Volo.Abp.BackgroundJobs.Abstractions/Volo.Abp.BackgroundJobs.Abstractions.csproj b/framework/src/Volo.Abp.BackgroundJobs.Abstractions/Volo.Abp.BackgroundJobs.Abstractions.csproj
index 3633fd45e3..e12574e992 100644
--- a/framework/src/Volo.Abp.BackgroundJobs.Abstractions/Volo.Abp.BackgroundJobs.Abstractions.csproj
+++ b/framework/src/Volo.Abp.BackgroundJobs.Abstractions/Volo.Abp.BackgroundJobs.Abstractions.csproj
@@ -5,6 +5,8 @@
 
   <PropertyGroup>
     <TargetFrameworks>netstandard2.0;netstandard2.1;net7.0</TargetFrameworks>
+    <Nullable>enable</Nullable>
+    <WarningsAsErrors>Nullable</WarningsAsErrors>
     <AssemblyName>Volo.Abp.BackgroundJobs.Abstractions</AssemblyName>
     <PackageId>Volo.Abp.BackgroundJobs.Abstractions</PackageId>
     <AssetTargetFallback>$(AssetTargetFallback);portable-net45+win8+wp8+wpa81;</AssetTargetFallback>
diff --git a/framework/src/Volo.Abp.BackgroundJobs.Abstractions/Volo/Abp/BackgroundJobs/BackgroundJobExecuter.cs b/framework/src/Volo.Abp.BackgroundJobs.Abstractions/Volo/Abp/BackgroundJobs/BackgroundJobExecuter.cs
index 7798a8d9a6..6b6d822c50 100644
--- a/framework/src/Volo.Abp.BackgroundJobs.Abstractions/Volo/Abp/BackgroundJobs/BackgroundJobExecuter.cs
+++ b/framework/src/Volo.Abp.BackgroundJobs.Abstractions/Volo/Abp/BackgroundJobs/BackgroundJobExecuter.cs
@@ -54,7 +54,7 @@ public class BackgroundJobExecuter : IBackgroundJobExecuter, ITransientDependenc
                 {
                     if (jobExecuteMethod.Name == nameof(IAsyncBackgroundJob<object>.ExecuteAsync))
                     {
-                        await ((Task)jobExecuteMethod.Invoke(job, new[] { context.JobArgs }));
+                        await ((Task)jobExecuteMethod.Invoke(job, new[] { context.JobArgs })!);
                     }
                     else
                     {
@@ -74,7 +74,7 @@ public class BackgroundJobExecuter : IBackgroundJobExecuter, ITransientDependenc
 
             throw new BackgroundJobExecutionException("A background job execution is failed. See inner exception for details.", ex)
             {
-                JobType = context.JobType.AssemblyQualifiedName,
+                JobType = context.JobType.AssemblyQualifiedName!,
                 JobArgs = context.JobArgs
             };
         }
diff --git a/framework/src/Volo.Abp.BackgroundJobs.Abstractions/Volo/Abp/BackgroundJobs/BackgroundJobExecutionException.cs b/framework/src/Volo.Abp.BackgroundJobs.Abstractions/Volo/Abp/BackgroundJobs/BackgroundJobExecutionException.cs
index 6c2df10a4f..f8c98437dc 100644
--- a/framework/src/Volo.Abp.BackgroundJobs.Abstractions/Volo/Abp/BackgroundJobs/BackgroundJobExecutionException.cs
+++ b/framework/src/Volo.Abp.BackgroundJobs.Abstractions/Volo/Abp/BackgroundJobs/BackgroundJobExecutionException.cs
@@ -6,9 +6,9 @@ namespace Volo.Abp.BackgroundJobs;
 [Serializable]
 public class BackgroundJobExecutionException : AbpException
 {
-    public string JobType { get; set; }
+    public string JobType { get; set; } = default!;
 
-    public object JobArgs { get; set; }
+    public object JobArgs { get; set; } = default!;
 
     public BackgroundJobExecutionException()
     {
diff --git a/framework/src/Volo.Abp.BackgroundJobs.Abstractions/Volo/Abp/BackgroundJobs/BackgroundJobNameAttribute.cs b/framework/src/Volo.Abp.BackgroundJobs.Abstractions/Volo/Abp/BackgroundJobs/BackgroundJobNameAttribute.cs
index edac395039..012569c423 100644
--- a/framework/src/Volo.Abp.BackgroundJobs.Abstractions/Volo/Abp/BackgroundJobs/BackgroundJobNameAttribute.cs
+++ b/framework/src/Volo.Abp.BackgroundJobs.Abstractions/Volo/Abp/BackgroundJobs/BackgroundJobNameAttribute.cs
@@ -22,11 +22,11 @@ public class BackgroundJobNameAttribute : Attribute, IBackgroundJobNameProvider
     {
         Check.NotNull(jobArgsType, nameof(jobArgsType));
 
-        return jobArgsType
-                   .GetCustomAttributes(true)
-                   .OfType<IBackgroundJobNameProvider>()
-                   .FirstOrDefault()
-                   ?.Name
-               ?? jobArgsType.FullName;
+        return (jobArgsType
+                    .GetCustomAttributes(true)
+                    .OfType<IBackgroundJobNameProvider>()
+                    .FirstOrDefault()
+                    ?.Name
+                ?? jobArgsType.FullName)!;
     }
 }