diff --git a/src/SharpCompress/Compressors/Rar/UnpackV2017/Unpack.cs b/src/SharpCompress/Compressors/Rar/UnpackV2017/Unpack.cs
index e8b29a40..7784d98a 100644
--- a/src/SharpCompress/Compressors/Rar/UnpackV2017/Unpack.cs
+++ b/src/SharpCompress/Compressors/Rar/UnpackV2017/Unpack.cs
@@ -1,5 +1,7 @@
 using System;
 using System.IO;
+using System.Threading;
+using System.Threading.Tasks;
 using SharpCompress.Common.Rar.Headers;
 using size_t = System.UInt32;
 
@@ -23,11 +25,11 @@ internal partial class Unpack : IRarUnpack
         // NOTE: caller has logic to check for -1 for error we throw instead.
         readStream.Read(buf, offset, count);
 
-    private async System.Threading.Tasks.Task<int> UnpIO_UnpReadAsync(
+    private async Task<int> UnpIO_UnpReadAsync(
         byte[] buf,
         int offset,
         int count,
-        System.Threading.CancellationToken cancellationToken = default
+        CancellationToken cancellationToken = default
     ) =>
         // NOTE: caller has logic to check for -1 for error we throw instead.
         await readStream.ReadAsync(buf, offset, count, cancellationToken).ConfigureAwait(false);
@@ -35,11 +37,11 @@ internal partial class Unpack : IRarUnpack
     private void UnpIO_UnpWrite(byte[] buf, size_t offset, uint count) =>
         writeStream.Write(buf, checked((int)offset), checked((int)count));
 
-    private async System.Threading.Tasks.Task UnpIO_UnpWriteAsync(
+    private async Task UnpIO_UnpWriteAsync(
         byte[] buf,
         size_t offset,
         uint count,
-        System.Threading.CancellationToken cancellationToken = default
+        CancellationToken cancellationToken = default
     ) =>
         await writeStream
             .WriteAsync(buf, checked((int)offset), checked((int)count), cancellationToken)
@@ -66,11 +68,11 @@ internal partial class Unpack : IRarUnpack
         DoUnpack();
     }
 
-    public async System.Threading.Tasks.Task DoUnpackAsync(
+    public async Task DoUnpackAsync(
         FileHeader fileHeader,
         Stream readStream,
         Stream writeStream,
-        System.Threading.CancellationToken cancellationToken = default
+        CancellationToken cancellationToken = default
     )
     {
         DestUnpSize = fileHeader.UncompressedSize;
@@ -97,9 +99,7 @@ internal partial class Unpack : IRarUnpack
         }
     }
 
-    public async System.Threading.Tasks.Task DoUnpackAsync(
-        System.Threading.CancellationToken cancellationToken = default
-    )
+    public async Task DoUnpackAsync(CancellationToken cancellationToken = default)
     {
         if (fileHeader.IsStored)
         {
@@ -133,9 +133,7 @@ internal partial class Unpack : IRarUnpack
         } while (!Suspended);
     }
 
-    private async System.Threading.Tasks.Task UnstoreFileAsync(
-        System.Threading.CancellationToken cancellationToken = default
-    )
+    private async Task UnstoreFileAsync(CancellationToken cancellationToken = default)
     {
         var buffer = new byte[(int)Math.Min(0x10000, DestUnpSize)];
         do
diff --git a/src/SharpCompress/Compressors/Rar/UnpackV2017/Unpack.unpack_cpp.cs b/src/SharpCompress/Compressors/Rar/UnpackV2017/Unpack.unpack_cpp.cs
index 0fe817a6..c518e11e 100644
--- a/src/SharpCompress/Compressors/Rar/UnpackV2017/Unpack.unpack_cpp.cs
+++ b/src/SharpCompress/Compressors/Rar/UnpackV2017/Unpack.unpack_cpp.cs
@@ -2,6 +2,8 @@
 
 using System;
 using System.Buffers;
+using System.Threading;
+using System.Threading.Tasks;
 using SharpCompress.Common;
 using static SharpCompress.Compressors.Rar.UnpackV2017.PackDef;
 using static SharpCompress.Compressors.Rar.UnpackV2017.UnpackGlobal;
@@ -196,10 +198,10 @@ internal sealed partial class Unpack : BitInput
         }
     }
 
-    private async System.Threading.Tasks.Task DoUnpackAsync(
+    private async Task DoUnpackAsync(
         uint Method,
         bool Solid,
-        System.Threading.CancellationToken cancellationToken = default
+        CancellationToken cancellationToken = default
     )
     {
         // Methods <50 will crash in Fragmented mode when accessing NULL Window.