diff --git a/src/lib-csharp/UpdateManager.cs b/src/lib-csharp/UpdateManager.cs
index 4f57a07b..7e1e7f76 100644
--- a/src/lib-csharp/UpdateManager.cs
+++ b/src/lib-csharp/UpdateManager.cs
@@ -1,11 +1,12 @@
 using System;
+using System.Collections.Generic;
 using System.ComponentModel;
+using System.Diagnostics;
 using System.IO;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
 using NuGet.Versioning;
-using Velopack.Compression;
 using Velopack.Exceptions;
 using Velopack.Locators;
 using Velopack.Logging;
@@ -231,8 +232,6 @@ namespace Velopack
             EnsureInstalled();
             using var _mut = await AcquireUpdateLock().ConfigureAwait(false);
 
-            var appTempDir = Locator.AppTempDir!;
-
             var completeFile = Locator.GetLocalPackagePath(targetRelease);
             var incompleteFile = completeFile + ".partial";
 
@@ -262,33 +261,9 @@ namespace Velopack
                                     $"There are too many delta's ({deltasCount} > 10) or the sum of their size ({deltasSize} > {targetRelease.Size}) is too large. " +
                                     $"Only full update will be available.");
                             } else {
-                                using var _1 = TempUtil.GetTempDirectory(out var deltaStagingDir, appTempDir);
-                                string basePackagePath = Locator.GetLocalPackagePath(updates.BaseRelease);
-                                if (!File.Exists(basePackagePath))
-                                    throw new Exception($"Unable to find base package {basePackagePath} for delta update.");
-                                EasyZip.ExtractZipToDirectory(Log, basePackagePath, deltaStagingDir);
-
-                                reportProgress(10);
-                                await DownloadAndApplyDeltaUpdates(
-                                        deltaStagingDir,
-                                        updates,
-                                        x => reportProgress(CoreUtil.CalculateProgress(x, 10, 80)),
-                                        cancelToken)
-                                    .ConfigureAwait(false);
-                                reportProgress(80);
-
-                                Log.Info("Delta updates completed, creating final update package.");
-                                File.Delete(incompleteFile);
-                                await EasyZip.CreateZipFromDirectoryAsync(
-                                    Log,
-                                    incompleteFile,
-                                    deltaStagingDir,
-                                    x => reportProgress(CoreUtil.CalculateProgress(x, 80, 100)),
-                                    cancelToken: cancelToken).ConfigureAwait(false);
-                                File.Delete(completeFile);
-                                File.Move(incompleteFile, completeFile);
-                                Log.Info("Delta release preparations complete. Package moved to: " + completeFile);
-                                reportProgress(100);
+                                await DownloadAndApplyDeltaUpdates(updates, incompleteFile, progress, cancelToken).ConfigureAwait(false);
+                                IoUtil.MoveFile(incompleteFile, completeFile, true);
+                                Log.Info("Delta update download complete. Package moved to: " + completeFile);
                                 return; // success!
                             }
                         }
@@ -336,19 +311,17 @@ namespace Velopack
         /// Given a folder containing the extracted base package, and a list of delta updates, downloads and applies the 
         /// delta updates to the base package.
         /// </summary>
-        /// <param name="extractedBasePackage">A folder containing the application files to apply the delta's to.</param>
         /// <param name="updates">An update object containing one or more delta's</param>
+        /// <param name="targetFile">The reconstructed full update after all delta's are applied</param>
         /// <param name="progress">A callback reporting process of delta application progress (from 0-100).</param>
         /// <param name="cancelToken">A token to use to cancel the request.</param>
-        protected virtual async Task DownloadAndApplyDeltaUpdates(string extractedBasePackage, UpdateInfo updates, Action<int> progress,
+        protected virtual async Task DownloadAndApplyDeltaUpdates(UpdateInfo updates, string targetFile, Action<int> progress,
             CancellationToken cancelToken)
         {
             var releasesToDownload = updates.DeltasToTarget.OrderBy(d => d.Version).ToArray();
-
-            var appTempDir = Locator.AppTempDir!;
             var updateExe = Locator.UpdateExePath!;
 
-            // downloading accounts for 0%-50% of progress
+            // downloading accounts for 0%-70% of progress
             double current = 0;
             double toIncrement = 100.0 / releasesToDownload.Count();
             await releasesToDownload.ForEachAsync(
@@ -365,7 +338,7 @@ namespace Velopack
                                 current -= component;
                                 component = toIncrement / 100.0 * p;
                                 var progressOfStep = (int) Math.Round(current += component);
-                                progress(CoreUtil.CalculateProgress(progressOfStep, 0, 50));
+                                progress(CoreUtil.CalculateProgress(progressOfStep, 0, 70));
                             }
                         },
                         cancelToken).ConfigureAwait(false);
@@ -374,23 +347,34 @@ namespace Velopack
                     Log.Debug($"Download complete for delta version {x.Version}");
                 }).ConfigureAwait(false);
 
-            Log.Info("All delta packages downloaded and verified, applying them to the base now. The delta staging dir is: " + extractedBasePackage);
+            Log.Info("All delta packages downloaded and verified, applying them to the base now.");
 
-            // applying deltas accounts for 50%-100% of progress
-            double progressStepSize = 100d / releasesToDownload.Length;
-            var builder = new DeltaUpdateExe(Log, appTempDir, updateExe);
-            for (var i = 0; i < releasesToDownload.Length; i++) {
-                cancelToken.ThrowIfCancellationRequested();
-                var rel = releasesToDownload[i];
-                double baseProgress = i * progressStepSize;
-                var packageFile = Locator.GetLocalPackagePath(rel);
-                builder.ApplyDeltaPackageFast(
-                    extractedBasePackage,
-                    packageFile,
-                    x => {
-                        var progressOfStep = (int) (baseProgress + (progressStepSize * (x / 100d)));
-                        progress(CoreUtil.CalculateProgress(progressOfStep, 50, 100));
-                    });
+            // applying deltas accounts for 70%-100% of progress
+            var baseFile = Locator.GetLocalPackagePath(updates.BaseRelease!);
+            var args = new List<string> {
+                "patch",
+                "--old",
+                baseFile,
+                "--output",
+                targetFile,
+            };
+
+            foreach (var x in releasesToDownload) {
+                args.Add("--delta");
+                args.Add(Locator.GetLocalPackagePath(x));
+            }
+
+            var psi = new ProcessStartInfo(updateExe);
+            psi.AppendArgumentListSafe(args, out var _);
+            psi.CreateNoWindow = true;
+            var p = psi.StartRedirectOutputToILogger(Log, VelopackLogLevel.Debug);
+            if (!p.WaitForExit((int)TimeSpan.FromMinutes(5).TotalMilliseconds)) {
+                p.Kill();
+                throw new TimeoutException("patch process timed out (5min).");
+            }
+
+            if (p.ExitCode != 0) {
+                throw new Exception($"patch process failed with exit code {p.ExitCode}.");
             }
 
             progress(100);
diff --git a/src/lib-csharp/Util/EasyZip.cs b/src/lib-csharp/Util/EasyZip.cs
index 26ffc5f7..c95c54ff 100644
--- a/src/lib-csharp/Util/EasyZip.cs
+++ b/src/lib-csharp/Util/EasyZip.cs
@@ -9,7 +9,7 @@ using System.Threading.Tasks;
 using Velopack.Logging;
 using Velopack.Util;
 
-namespace Velopack.Compression
+namespace Velopack.Util
 {
     internal static class EasyZip
     {
diff --git a/src/vpk/Velopack.Build/TaskOptionsMapper.cs b/src/vpk/Velopack.Build/TaskOptionsMapper.cs
index e3164e5a..07e12971 100644
--- a/src/vpk/Velopack.Build/TaskOptionsMapper.cs
+++ b/src/vpk/Velopack.Build/TaskOptionsMapper.cs
@@ -2,6 +2,7 @@
 using System.IO;
 using Riok.Mapperly.Abstractions;
 using Velopack.Packaging;
+using Velopack.Packaging.Compression;
 using Velopack.Packaging.Unix.Commands;
 using Velopack.Packaging.Windows.Commands;
 
diff --git a/src/vpk/Velopack.Flow/VelopackFlowServiceClient.cs b/src/vpk/Velopack.Flow/VelopackFlowServiceClient.cs
index 483d7a41..a8338602 100644
--- a/src/vpk/Velopack.Flow/VelopackFlowServiceClient.cs
+++ b/src/vpk/Velopack.Flow/VelopackFlowServiceClient.cs
@@ -13,6 +13,7 @@ using Velopack.NuGet;
 using Velopack.Packaging;
 using Velopack.Util;
 using System.Net;
+using Velopack.Packaging.Compression;
 
 #if !NET6_0_OR_GREATER
 using System.Net.Http;
diff --git a/src/vpk/Velopack.Packaging.Unix/AppImageTool.cs b/src/vpk/Velopack.Packaging.Unix/AppImageTool.cs
index f0efdf24..e4a97f69 100644
--- a/src/vpk/Velopack.Packaging.Unix/AppImageTool.cs
+++ b/src/vpk/Velopack.Packaging.Unix/AppImageTool.cs
@@ -1,6 +1,5 @@
 using ICSharpCode.SharpZipLib.Tar;
 using Microsoft.Extensions.Logging;
-using Velopack.Compression;
 using Velopack.Core;
 using Velopack.Util;
 
diff --git a/src/vpk/Velopack.Packaging.Unix/Commands/LinuxPackCommandRunner.cs b/src/vpk/Velopack.Packaging.Unix/Commands/LinuxPackCommandRunner.cs
index d0cb3bba..934ded32 100644
--- a/src/vpk/Velopack.Packaging.Unix/Commands/LinuxPackCommandRunner.cs
+++ b/src/vpk/Velopack.Packaging.Unix/Commands/LinuxPackCommandRunner.cs
@@ -2,6 +2,7 @@
 using Microsoft.Extensions.Logging;
 using Velopack.Core;
 using Velopack.Core.Abstractions;
+using Velopack.Packaging.Compression;
 using Velopack.Util;
 
 namespace Velopack.Packaging.Unix.Commands;
diff --git a/src/vpk/Velopack.Packaging.Unix/Commands/LinuxPackOptions.cs b/src/vpk/Velopack.Packaging.Unix/Commands/LinuxPackOptions.cs
index 19c0fa45..ec0779c4 100644
--- a/src/vpk/Velopack.Packaging.Unix/Commands/LinuxPackOptions.cs
+++ b/src/vpk/Velopack.Packaging.Unix/Commands/LinuxPackOptions.cs
@@ -1,4 +1,5 @@
 using Velopack.Packaging.Abstractions;
+using Velopack.Packaging.Compression;
 
 namespace Velopack.Packaging.Unix.Commands;
 
diff --git a/src/vpk/Velopack.Packaging.Unix/Commands/OsxPackOptions.cs b/src/vpk/Velopack.Packaging.Unix/Commands/OsxPackOptions.cs
index 9e9c41db..51010184 100644
--- a/src/vpk/Velopack.Packaging.Unix/Commands/OsxPackOptions.cs
+++ b/src/vpk/Velopack.Packaging.Unix/Commands/OsxPackOptions.cs
@@ -1,4 +1,5 @@
 using Velopack.Packaging.Abstractions;
+using Velopack.Packaging.Compression;
 
 namespace Velopack.Packaging.Unix.Commands;
 
diff --git a/src/vpk/Velopack.Packaging.Windows/Commands/WindowsPackCommandRunner.cs b/src/vpk/Velopack.Packaging.Windows/Commands/WindowsPackCommandRunner.cs
index 1893370c..997e441e 100644
--- a/src/vpk/Velopack.Packaging.Windows/Commands/WindowsPackCommandRunner.cs
+++ b/src/vpk/Velopack.Packaging.Windows/Commands/WindowsPackCommandRunner.cs
@@ -5,7 +5,6 @@ using System.Text.RegularExpressions;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
 using NuGet.Versioning;
-using Velopack.Compression;
 using Velopack.Core;
 using Velopack.Core.Abstractions;
 using Velopack.NuGet;
diff --git a/src/vpk/Velopack.Packaging.Windows/Commands/WindowsReleasifyOptions.cs b/src/vpk/Velopack.Packaging.Windows/Commands/WindowsReleasifyOptions.cs
index 747953a1..97f537b8 100644
--- a/src/vpk/Velopack.Packaging.Windows/Commands/WindowsReleasifyOptions.cs
+++ b/src/vpk/Velopack.Packaging.Windows/Commands/WindowsReleasifyOptions.cs
@@ -1,4 +1,6 @@
-namespace Velopack.Packaging.Windows.Commands;
+using Velopack.Packaging.Compression;
+
+namespace Velopack.Packaging.Windows.Commands;
 
 public class WindowsReleasifyOptions : WindowsSigningOptions
 {
diff --git a/src/vpk/Velopack.Packaging/Abstractions/IPackOptions.cs b/src/vpk/Velopack.Packaging/Abstractions/IPackOptions.cs
index 9b2fb687..9656b261 100644
--- a/src/vpk/Velopack.Packaging/Abstractions/IPackOptions.cs
+++ b/src/vpk/Velopack.Packaging/Abstractions/IPackOptions.cs
@@ -1,4 +1,6 @@
-namespace Velopack.Packaging.Abstractions;
+using Velopack.Packaging.Compression;
+
+namespace Velopack.Packaging.Abstractions;
 
 public interface IPackOptions : INugetPackCommand, IPlatformOptions
 {
diff --git a/src/vpk/Velopack.Packaging/Commands/DeltaGenCommandRunner.cs b/src/vpk/Velopack.Packaging/Commands/DeltaGenCommandRunner.cs
index cf7b93b6..1f45eff4 100644
--- a/src/vpk/Velopack.Packaging/Commands/DeltaGenCommandRunner.cs
+++ b/src/vpk/Velopack.Packaging/Commands/DeltaGenCommandRunner.cs
@@ -1,5 +1,6 @@
 using Microsoft.Extensions.Logging;
 using Velopack.Core.Abstractions;
+using Velopack.Packaging.Compression;
 
 namespace Velopack.Packaging.Commands;
 
diff --git a/src/vpk/Velopack.Packaging/Commands/DeltaGenOptions.cs b/src/vpk/Velopack.Packaging/Commands/DeltaGenOptions.cs
index 92f00a2d..869aebf1 100644
--- a/src/vpk/Velopack.Packaging/Commands/DeltaGenOptions.cs
+++ b/src/vpk/Velopack.Packaging/Commands/DeltaGenOptions.cs
@@ -1,4 +1,5 @@
 using Velopack.Core;
+using Velopack.Packaging.Compression;
 
 namespace Velopack.Packaging.Commands;
 
diff --git a/src/vpk/Velopack.Packaging/Commands/DeltaPatchCommandRunner.cs b/src/vpk/Velopack.Packaging/Commands/DeltaPatchCommandRunner.cs
index 11bc3fad..02c1b835 100644
--- a/src/vpk/Velopack.Packaging/Commands/DeltaPatchCommandRunner.cs
+++ b/src/vpk/Velopack.Packaging/Commands/DeltaPatchCommandRunner.cs
@@ -1,7 +1,7 @@
 using Microsoft.Extensions.Logging;
-using Velopack.Compression;
 using Velopack.Core;
 using Velopack.Core.Abstractions;
+using Velopack.Packaging.Compression;
 using Velopack.Util;
 
 namespace Velopack.Packaging.Commands;
diff --git a/src/vpk/Velopack.Packaging/Compression/BZip2Stream.cs b/src/vpk/Velopack.Packaging/Compression/BZip2Stream.cs
index e00bdebc..b0489be7 100644
--- a/src/vpk/Velopack.Packaging/Compression/BZip2Stream.cs
+++ b/src/vpk/Velopack.Packaging/Compression/BZip2Stream.cs
@@ -1,10 +1,8 @@
 #nullable disable
-using System;
 using System.Diagnostics.CodeAnalysis;
-using System.IO;
 using System.IO.Compression;
 
-namespace Velopack.Compression
+namespace Velopack.Packaging.Compression
 {
     [ExcludeFromCodeCoverage]
     internal sealed class BZip2Stream : Stream
diff --git a/src/vpk/Velopack.Packaging/Compression/BinaryPatchUtility.cs b/src/vpk/Velopack.Packaging/Compression/BinaryPatchUtility.cs
index 0df5d978..84999bef 100644
--- a/src/vpk/Velopack.Packaging/Compression/BinaryPatchUtility.cs
+++ b/src/vpk/Velopack.Packaging/Compression/BinaryPatchUtility.cs
@@ -1,13 +1,10 @@
 #nullable disable
-using System;
 using System.Diagnostics.CodeAnalysis;
-using System.IO;
 using System.IO.Compression;
-using System.Threading;
 
 // Adapted from https://github.com/LogosBible/bsdiff.net/blob/master/src/bsdiff/BinaryPatchUtility.cs
 
-namespace Velopack.Compression
+namespace Velopack.Packaging.Compression
 {
     /*
     The original bsdiff.c source code (http://www.daemonology.net/bsdiff/) is
diff --git a/src/vpk/Velopack.Packaging/Compression/DeltaEmbedded.cs b/src/vpk/Velopack.Packaging/Compression/DeltaEmbedded.cs
index 86d871b0..83821e4b 100644
--- a/src/vpk/Velopack.Packaging/Compression/DeltaEmbedded.cs
+++ b/src/vpk/Velopack.Packaging/Compression/DeltaEmbedded.cs
@@ -1,8 +1,7 @@
 using Microsoft.Extensions.Logging;
-using Velopack.Compression;
 using Velopack.Core;
 
-namespace Velopack.Packaging;
+namespace Velopack.Packaging.Compression;
 
 public class DeltaEmbedded
 {
diff --git a/src/vpk/Velopack.Packaging/Compression/DeltaMode.cs b/src/vpk/Velopack.Packaging/Compression/DeltaMode.cs
index 78d4877b..7d0e0bb9 100644
--- a/src/vpk/Velopack.Packaging/Compression/DeltaMode.cs
+++ b/src/vpk/Velopack.Packaging/Compression/DeltaMode.cs
@@ -1,4 +1,4 @@
-namespace Velopack.Packaging;
+namespace Velopack.Packaging.Compression;
 
 public enum DeltaMode
 {
diff --git a/src/vpk/Velopack.Packaging/Compression/DeltaPackage.cs b/src/vpk/Velopack.Packaging/Compression/DeltaPackage.cs
index 8083127c..733e0b5a 100644
--- a/src/vpk/Velopack.Packaging/Compression/DeltaPackage.cs
+++ b/src/vpk/Velopack.Packaging/Compression/DeltaPackage.cs
@@ -1,14 +1,11 @@
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
+#nullable enable
 using System.Text;
 using System.Text.RegularExpressions;
 using Velopack.Exceptions;
 using Velopack.Logging;
 using Velopack.Util;
 
-namespace Velopack.Compression
+namespace Velopack.Packaging.Compression
 {
     internal abstract class DeltaPackage
     {
diff --git a/src/vpk/Velopack.Packaging/Compression/DeltaPackageBuilder.cs b/src/vpk/Velopack.Packaging/Compression/DeltaPackageBuilder.cs
index 8a8fb877..28ab8f80 100644
--- a/src/vpk/Velopack.Packaging/Compression/DeltaPackageBuilder.cs
+++ b/src/vpk/Velopack.Packaging/Compression/DeltaPackageBuilder.cs
@@ -1,12 +1,11 @@
 using System.IO.MemoryMappedFiles;
 using System.Text;
 using Microsoft.Extensions.Logging;
-using Velopack.Compression;
 using Velopack.Core;
 using Velopack.Packaging.Exceptions;
 using Velopack.Util;
 
-namespace Velopack.Packaging;
+namespace Velopack.Packaging.Compression;
 
 public class DeltaPackageBuilder
 {
diff --git a/src/vpk/Velopack.Packaging/Compression/DeltaUpdateExe.cs b/src/vpk/Velopack.Packaging/Compression/DeltaUpdateExe.cs
index 1d198367..d8597afd 100644
--- a/src/vpk/Velopack.Packaging/Compression/DeltaUpdateExe.cs
+++ b/src/vpk/Velopack.Packaging/Compression/DeltaUpdateExe.cs
@@ -1,9 +1,8 @@
-using System;
-using System.Diagnostics;
+using System.Diagnostics;
 using Velopack.Logging;
 using Velopack.Util;
 
-namespace Velopack.Compression
+namespace Velopack.Packaging.Compression
 {
     internal class DeltaUpdateExe : DeltaPackage
     {
diff --git a/src/vpk/Velopack.Packaging/Compression/MsDeltaCompression.cs b/src/vpk/Velopack.Packaging/Compression/MsDeltaCompression.cs
index 29a3fdc0..4aee72ae 100644
--- a/src/vpk/Velopack.Packaging/Compression/MsDeltaCompression.cs
+++ b/src/vpk/Velopack.Packaging/Compression/MsDeltaCompression.cs
@@ -1,10 +1,10 @@
-using System;
+#nullable enable
 using System.ComponentModel;
 using System.Diagnostics.CodeAnalysis;
 using System.Runtime.InteropServices;
 using System.Runtime.Versioning;
 
-namespace Velopack.Compression
+namespace Velopack.Packaging.Compression
 {
     [ExcludeFromCodeCoverage]
     [SupportedOSPlatform("windows")]
diff --git a/src/vpk/Velopack.Packaging/PackageBuilder.cs b/src/vpk/Velopack.Packaging/PackageBuilder.cs
index c5120f64..42607ef2 100644
--- a/src/vpk/Velopack.Packaging/PackageBuilder.cs
+++ b/src/vpk/Velopack.Packaging/PackageBuilder.cs
@@ -3,11 +3,11 @@ using System.Text.RegularExpressions;
 using Markdig;
 using Microsoft.Extensions.Logging;
 using NuGet.Versioning;
-using Velopack.Compression;
 using Velopack.Core;
 using Velopack.Core.Abstractions;
 using Velopack.NuGet;
 using Velopack.Packaging.Abstractions;
+using Velopack.Packaging.Compression;
 using Velopack.Util;
 
 namespace Velopack.Packaging;
diff --git a/src/vpk/Velopack.Packaging/Zstd.cs b/src/vpk/Velopack.Packaging/Zstd.cs
index aadc82fe..7222193e 100644
--- a/src/vpk/Velopack.Packaging/Zstd.cs
+++ b/src/vpk/Velopack.Packaging/Zstd.cs
@@ -1,4 +1,5 @@
 using Velopack.Core;
+using Velopack.Packaging.Compression;
 using Velopack.Packaging.Exceptions;
 
 namespace Velopack.Packaging;
diff --git a/src/vpk/Velopack.Vpk/Commands/Packaging/DeltaGenCommand.cs b/src/vpk/Velopack.Vpk/Commands/Packaging/DeltaGenCommand.cs
index 50e590df..4d3a71ff 100644
--- a/src/vpk/Velopack.Vpk/Commands/Packaging/DeltaGenCommand.cs
+++ b/src/vpk/Velopack.Vpk/Commands/Packaging/DeltaGenCommand.cs
@@ -1,5 +1,6 @@
 using Velopack.Core;
 using Velopack.Packaging;
+using Velopack.Packaging.Compression;
 
 namespace Velopack.Vpk.Commands.Packaging;
 
diff --git a/src/vpk/Velopack.Vpk/Commands/Packaging/PackCommand.cs b/src/vpk/Velopack.Vpk/Commands/Packaging/PackCommand.cs
index 93f17dd5..a942abab 100644
--- a/src/vpk/Velopack.Vpk/Commands/Packaging/PackCommand.cs
+++ b/src/vpk/Velopack.Vpk/Commands/Packaging/PackCommand.cs
@@ -1,5 +1,6 @@
 
 using Velopack.Packaging;
+using Velopack.Packaging.Compression;
 
 namespace Velopack.Vpk.Commands.Packaging;
 
diff --git a/test/Velopack.CommandLine.Tests/Commands/WindowsCommandTests.cs b/test/Velopack.CommandLine.Tests/Commands/WindowsCommandTests.cs
index 7792a126..c9bdbb70 100644
--- a/test/Velopack.CommandLine.Tests/Commands/WindowsCommandTests.cs
+++ b/test/Velopack.CommandLine.Tests/Commands/WindowsCommandTests.cs
@@ -41,7 +41,7 @@ public abstract class ReleaseCommandTests<T> : BaseCommandTests<T>
         string cli = GetRequiredDefaultOptions() + "--delta none";
         ParseResult parseResult = command.ParseAndApply(cli);
 
-        Assert.True(command.DeltaMode == Packaging.DeltaMode.None);
+        Assert.True(command.DeltaMode == Packaging.Compression.DeltaMode.None);
     }
 
     [Fact]
diff --git a/test/Velopack.Packaging.Tests/OsxPackTests.cs b/test/Velopack.Packaging.Tests/OsxPackTests.cs
index e84818d8..e69b8fbf 100644
--- a/test/Velopack.Packaging.Tests/OsxPackTests.cs
+++ b/test/Velopack.Packaging.Tests/OsxPackTests.cs
@@ -1,5 +1,4 @@
 using System.Runtime.Versioning;
-using Velopack.Compression;
 using Velopack.Core;
 using Velopack.Util;
 
diff --git a/test/Velopack.Packaging.Tests/WindowsPackTests.cs b/test/Velopack.Packaging.Tests/WindowsPackTests.cs
index b7cb2818..af1e39f3 100644
--- a/test/Velopack.Packaging.Tests/WindowsPackTests.cs
+++ b/test/Velopack.Packaging.Tests/WindowsPackTests.cs
@@ -5,9 +5,9 @@ using System.Xml.Linq;
 using Microsoft.Deployment.WindowsInstaller;
 using Microsoft.Win32;
 using NuGet.Packaging;
-using Velopack.Compression;
 using Velopack.Core;
 using Velopack.Packaging.Commands;
+using Velopack.Packaging.Compression;
 using Velopack.Packaging.Windows.Commands;
 using Velopack.Util;
 using Velopack.Vpk;
diff --git a/test/Velopack.Tests/SymbolicLinkTests.cs b/test/Velopack.Tests/SymbolicLinkTests.cs
index cc2fc866..75288892 100644
--- a/test/Velopack.Tests/SymbolicLinkTests.cs
+++ b/test/Velopack.Tests/SymbolicLinkTests.cs
@@ -1,7 +1,6 @@
 using System.ComponentModel;
 using System.IO.Compression;
 using NCode.ReparsePoints;
-using Velopack.Compression;
 using Velopack.Logging;
 using Velopack.Util;
 
diff --git a/test/Velopack.Tests/UpdateManagerTests.cs b/test/Velopack.Tests/UpdateManagerTests.cs
index 75ca34ef..8816c322 100644
--- a/test/Velopack.Tests/UpdateManagerTests.cs
+++ b/test/Velopack.Tests/UpdateManagerTests.cs
@@ -1,6 +1,5 @@
 using System.Text;
 using NuGet.Versioning;
-using Velopack.Compression;
 using Velopack.Core;
 using Velopack.Exceptions;
 using Velopack.Locators;
diff --git a/test/Velopack.Tests/ZipPackageTests.cs b/test/Velopack.Tests/ZipPackageTests.cs
index a16bc3da..9950b386 100644
--- a/test/Velopack.Tests/ZipPackageTests.cs
+++ b/test/Velopack.Tests/ZipPackageTests.cs
@@ -39,8 +39,8 @@ public class ZipPackageTests
         SymbolicLink.Create(symlink, actual);
         SymbolicLink.Create(symfile, actualFile);
 
-        Compression.EasyZip.CreateZipFromDirectoryAsync(logger.ToVelopackLogger(), zipFile, tempDir).GetAwaiterResult();
-        Compression.EasyZip.ExtractZipToDirectory(logger.ToVelopackLogger(), zipFile, extractedDir, expandSymlinks: true);
+        EasyZip.CreateZipFromDirectoryAsync(logger.ToVelopackLogger(), zipFile, tempDir).GetAwaiterResult();
+        EasyZip.ExtractZipToDirectory(logger.ToVelopackLogger(), zipFile, extractedDir, expandSymlinks: true);
 
         Assert.True(File.Exists(Path.Combine(extractedDir, "actual", "file.txt")));
         Assert.Equal("hello", File.ReadAllText(Path.Combine(extractedDir, "actual", "file.txt")));