diff --git a/framework/src/Volo.Abp.BlobStoring/Volo.Abp.BlobStoring.csproj b/framework/src/Volo.Abp.BlobStoring/Volo.Abp.BlobStoring.csproj
index 6b3c44a49b..dc29c32a63 100644
--- a/framework/src/Volo.Abp.BlobStoring/Volo.Abp.BlobStoring.csproj
+++ b/framework/src/Volo.Abp.BlobStoring/Volo.Abp.BlobStoring.csproj
@@ -5,6 +5,8 @@
 
   <PropertyGroup>
     <TargetFrameworks>netstandard2.0;netstandard2.1;net7.0</TargetFrameworks>
+    <Nullable>enable</Nullable>
+    <WarningsAsErrors>Nullable</WarningsAsErrors>
     <AssemblyName>Volo.Abp.BlobStoring</AssemblyName>
     <PackageId>Volo.Abp.BlobStoring</PackageId>
     <AssetTargetFallback>$(AssetTargetFallback);portable-net45+win8+wp8+wpa81;</AssetTargetFallback>
diff --git a/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobContainer.cs b/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobContainer.cs
index f546a59adf..13eb0dcc68 100644
--- a/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobContainer.cs
+++ b/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobContainer.cs
@@ -61,7 +61,7 @@ public class BlobContainer<TContainer> : IBlobContainer<TContainer>
         );
     }
 
-    public Task<Stream> GetOrNullAsync(
+    public Task<Stream?> GetOrNullAsync(
         string name,
         CancellationToken cancellationToken = default)
     {
@@ -118,9 +118,9 @@ public class BlobContainer : IBlobContainer
 
             await Provider.SaveAsync(
                 new BlobProviderSaveArgs(
-                    blobNormalizeNaming.ContainerName,
+                    blobNormalizeNaming.ContainerName!,
                     Configuration,
-                    blobNormalizeNaming.BlobName,
+                    blobNormalizeNaming.BlobName!,
                     stream,
                     overrideExisting,
                     CancellationTokenProvider.FallbackToProvider(cancellationToken)
@@ -140,9 +140,9 @@ public class BlobContainer : IBlobContainer
 
             return await Provider.DeleteAsync(
                 new BlobProviderDeleteArgs(
-                    blobNormalizeNaming.ContainerName,
+                    blobNormalizeNaming.ContainerName!,
                     Configuration,
-                    blobNormalizeNaming.BlobName,
+                    blobNormalizeNaming.BlobName!,
                     CancellationTokenProvider.FallbackToProvider(cancellationToken)
                 )
             );
@@ -160,9 +160,9 @@ public class BlobContainer : IBlobContainer
 
             return await Provider.ExistsAsync(
                 new BlobProviderExistsArgs(
-                    blobNormalizeNaming.ContainerName,
+                    blobNormalizeNaming.ContainerName!,
                     Configuration,
-                    blobNormalizeNaming.BlobName,
+                    blobNormalizeNaming.BlobName!,
                     CancellationTokenProvider.FallbackToProvider(cancellationToken)
                 )
             );
@@ -185,7 +185,7 @@ public class BlobContainer : IBlobContainer
         return stream;
     }
 
-    public virtual async Task<Stream> GetOrNullAsync(
+    public virtual async Task<Stream?> GetOrNullAsync(
         string name,
         CancellationToken cancellationToken = default)
     {
@@ -196,9 +196,9 @@ public class BlobContainer : IBlobContainer
 
             return await Provider.GetOrNullAsync(
                 new BlobProviderGetArgs(
-                    blobNormalizeNaming.ContainerName,
+                    blobNormalizeNaming.ContainerName!,
                     Configuration,
-                    blobNormalizeNaming.BlobName,
+                    blobNormalizeNaming.BlobName!,
                     CancellationTokenProvider.FallbackToProvider(cancellationToken)
                 )
             );
diff --git a/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobContainerConfiguration.cs b/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobContainerConfiguration.cs
index 20121b3144..fe0a0e09f9 100644
--- a/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobContainerConfiguration.cs
+++ b/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobContainerConfiguration.cs
@@ -10,7 +10,7 @@ public class BlobContainerConfiguration
     /// <summary>
     /// The provider to be used to store BLOBs of this container.
     /// </summary>
-    public Type ProviderType { get; set; }
+    public Type? ProviderType { get; set; }
 
     /// <summary>
     /// Indicates whether this container is multi-tenant or not.
@@ -26,25 +26,23 @@ public class BlobContainerConfiguration
 
     public ITypeList<IBlobNamingNormalizer> NamingNormalizers { get; }
 
-    [NotNull] private readonly Dictionary<string, object> _properties;
+    [NotNull] private readonly Dictionary<string, object?> _properties;
 
-    [CanBeNull] private readonly BlobContainerConfiguration _fallbackConfiguration;
+    private readonly BlobContainerConfiguration? _fallbackConfiguration;
 
-    public BlobContainerConfiguration(BlobContainerConfiguration fallbackConfiguration = null)
+    public BlobContainerConfiguration(BlobContainerConfiguration? fallbackConfiguration = null)
     {
         NamingNormalizers = new TypeList<IBlobNamingNormalizer>();
         _fallbackConfiguration = fallbackConfiguration;
-        _properties = new Dictionary<string, object>();
+        _properties = new Dictionary<string, object?>();
     }
 
-    [CanBeNull]
-    public T GetConfigurationOrDefault<T>(string name, T defaultValue = default)
+    public T? GetConfigurationOrDefault<T>(string name, T? defaultValue = default)
     {
-        return (T)GetConfigurationOrNull(name, defaultValue);
+        return (T?)GetConfigurationOrNull(name, defaultValue);
     }
 
-    [CanBeNull]
-    public object GetConfigurationOrNull(string name, object defaultValue = null)
+    public object? GetConfigurationOrNull(string name, object? defaultValue = null)
     {
         return _properties.GetOrDefault(name) ??
                _fallbackConfiguration?.GetConfigurationOrNull(name, defaultValue) ??
@@ -52,7 +50,7 @@ public class BlobContainerConfiguration
     }
 
     [NotNull]
-    public BlobContainerConfiguration SetConfiguration([NotNull] string name, [CanBeNull] object value)
+    public BlobContainerConfiguration SetConfiguration([NotNull] string name, object? value)
     {
         Check.NotNullOrWhiteSpace(name, nameof(name));
         Check.NotNull(value, nameof(value));
diff --git a/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobContainerExtensions.cs b/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobContainerExtensions.cs
index b9c96bad08..0bc57ddc35 100644
--- a/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobContainerExtensions.cs
+++ b/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobContainerExtensions.cs
@@ -37,7 +37,7 @@ public static class BlobContainerExtensions
         }
     }
 
-    public static async Task<byte[]> GetAllBytesOrNullAsync(
+    public static async Task<byte[]?> GetAllBytesOrNullAsync(
         this IBlobContainer container,
         string name,
         CancellationToken cancellationToken = default)
diff --git a/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobContainerNameAttribute.cs b/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobContainerNameAttribute.cs
index 4eb597053d..e72df48f17 100644
--- a/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobContainerNameAttribute.cs
+++ b/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobContainerNameAttribute.cs
@@ -32,7 +32,7 @@ public class BlobContainerNameAttribute : Attribute
 
         if (nameAttribute == null)
         {
-            return type.FullName;
+            return type.FullName!;
         }
 
         return nameAttribute.GetName(type);
diff --git a/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobNormalizeNaming.cs b/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobNormalizeNaming.cs
index 301b030a61..34f46a49cc 100644
--- a/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobNormalizeNaming.cs
+++ b/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobNormalizeNaming.cs
@@ -2,11 +2,11 @@
 
 public class BlobNormalizeNaming
 {
-    public string ContainerName { get; }
+    public string? ContainerName { get; }
 
-    public string BlobName { get; }
+    public string? BlobName { get; }
 
-    public BlobNormalizeNaming(string containerName, string blobName)
+    public BlobNormalizeNaming(string? containerName, string? blobName)
     {
         ContainerName = containerName;
         BlobName = blobName;
diff --git a/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobNormalizeNamingService.cs b/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobNormalizeNamingService.cs
index 42fd3759c9..397b48ca0c 100644
--- a/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobNormalizeNamingService.cs
+++ b/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobNormalizeNamingService.cs
@@ -16,8 +16,8 @@ public class BlobNormalizeNamingService : IBlobNormalizeNamingService, ITransien
 
     public BlobNormalizeNaming NormalizeNaming(
         BlobContainerConfiguration configuration,
-        string containerName,
-        string blobName)
+        string? containerName,
+        string? blobName)
     {
 
         if (!configuration.NamingNormalizers.Any())
@@ -33,8 +33,8 @@ public class BlobNormalizeNamingService : IBlobNormalizeNamingService, ITransien
                     .GetRequiredService(normalizerType)
                     .As<IBlobNamingNormalizer>();
 
-                containerName = containerName.IsNullOrWhiteSpace() ? containerName : normalizer.NormalizeContainerName(containerName);
-                blobName = blobName.IsNullOrWhiteSpace() ? blobName : normalizer.NormalizeBlobName(blobName);
+                containerName = containerName.IsNullOrWhiteSpace() ? containerName : normalizer.NormalizeContainerName(containerName!);
+                blobName = blobName.IsNullOrWhiteSpace() ? blobName : normalizer.NormalizeBlobName(blobName!);
             }
 
             return new BlobNormalizeNaming(containerName, blobName);
@@ -48,7 +48,7 @@ public class BlobNormalizeNamingService : IBlobNormalizeNamingService, ITransien
             return containerName;
         }
 
-        return NormalizeNaming(configuration, containerName, null).ContainerName;
+        return NormalizeNaming(configuration, containerName, null).ContainerName!;
     }
 
     public string NormalizeBlobName(BlobContainerConfiguration configuration, string blobName)
@@ -58,6 +58,6 @@ public class BlobNormalizeNamingService : IBlobNormalizeNamingService, ITransien
             return blobName;
         }
 
-        return NormalizeNaming(configuration, null, blobName).BlobName;
+        return NormalizeNaming(configuration, null, blobName).BlobName!;
     }
 }
diff --git a/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobProviderBase.cs b/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobProviderBase.cs
index ca7b14476e..8e7e923ed8 100644
--- a/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobProviderBase.cs
+++ b/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobProviderBase.cs
@@ -14,7 +14,7 @@ public abstract class BlobProviderBase : IBlobProvider
 
     public abstract Task<Stream> GetOrNullAsync(BlobProviderGetArgs args);
 
-    protected virtual async Task<Stream> TryCopyToMemoryStreamAsync(Stream stream, CancellationToken cancellationToken = default)
+    protected virtual async Task<Stream?> TryCopyToMemoryStreamAsync(Stream? stream, CancellationToken cancellationToken = default)
     {
         if (stream == null)
         {
diff --git a/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/IBlobContainer.cs b/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/IBlobContainer.cs
index 8d6328bca7..e43b596c8d 100644
--- a/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/IBlobContainer.cs
+++ b/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/IBlobContainer.cs
@@ -78,7 +78,7 @@ public interface IBlobContainer
     /// <returns>
     /// A <see cref="Stream"/> to read the blob data.
     /// </returns>
-    Task<Stream> GetOrNullAsync(
+    Task<Stream?> GetOrNullAsync(
         string name,
         CancellationToken cancellationToken = default
     );