diff --git a/.github/workflows/GithubActionsRelease.yml b/.github/workflows/GithubActionsRelease.yml
index bfd7821..1f18782 100644
--- a/.github/workflows/GithubActionsRelease.yml
+++ b/.github/workflows/GithubActionsRelease.yml
@@ -56,11 +56,10 @@ jobs:
       with:
         persist-credentials: false
 
-    - name: Use prelease dotnet
-      uses: actions/setup-dotnet@v2
+    - name: Use dotnet
+      uses: actions/setup-dotnet@v4
       with:
         dotnet-version: '8.x'
-        include-prerelease: true
 
     - name: Get the version
       run:  echo "version=${GITHUB_REF/refs\/tags\//}" >> $GITHUB_ENV
diff --git a/.github/workflows/GithubActionsWIP.yml b/.github/workflows/GithubActionsWIP.yml
index fdbe25d..479231f 100644
--- a/.github/workflows/GithubActionsWIP.yml
+++ b/.github/workflows/GithubActionsWIP.yml
@@ -36,10 +36,9 @@ jobs:
         persist-credentials: false
 
     - name: Use prelease dotnet
-      uses: actions/setup-dotnet@v2
+      uses: actions/setup-dotnet@v4
       with:
         dotnet-version: '8.x'
-        include-prerelease: true
 
     - name: Build CompressedStaticFiles.AspNetCore 🔧
       run: dotnet build ${{env.projectCSFB}} --configuration ${{env.buildConfiguration}} --version-suffix ${{env.ciSuffix}}
diff --git a/CompressedStaticFiles.AspNet.Tests/CompressedStaticFiles.AspNet.Tests.csproj b/CompressedStaticFiles.AspNet.Tests/CompressedStaticFiles.AspNet.Tests.csproj
index 1ed723f..84f3a23 100644
--- a/CompressedStaticFiles.AspNet.Tests/CompressedStaticFiles.AspNet.Tests.csproj
+++ b/CompressedStaticFiles.AspNet.Tests/CompressedStaticFiles.AspNet.Tests.csproj
@@ -6,16 +6,16 @@
 	</PropertyGroup>
 
 	<ItemGroup>
-		<PackageReference Include="Microsoft.AspNetCore.TestHost" Version="8.0.0" />
-		<PackageReference Include="coverlet.collector" Version="6.0.0">
+		<PackageReference Include="Microsoft.AspNetCore.TestHost" Version="8.0.3" />
+		<PackageReference Include="coverlet.collector" Version="6.0.2">
 			<PrivateAssets>all</PrivateAssets>
 			<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
 		</PackageReference>
 		<PackageReference Include="FluentAssertions" Version="6.12.0" />
-		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0-preview-23531-01" />
+		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
 		<PackageReference Include="NSubstitute" Version="5.1.0" />
-		<PackageReference Include="xunit" Version="2.6.1" />
-		<PackageReference Include="xunit.runner.visualstudio" Version="2.5.3">
+		<PackageReference Include="xunit" Version="2.7.0" />
+		<PackageReference Include="xunit.runner.visualstudio" Version="2.5.7">
 			<PrivateAssets>all</PrivateAssets>
 			<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
 		</PackageReference>
diff --git a/CompressedStaticFiles.AspNet/AlternativeImageFile.cs b/CompressedStaticFiles.AspNet/AlternativeImageFile.cs
index e6e3b33..7bae2cf 100644
--- a/CompressedStaticFiles.AspNet/AlternativeImageFile.cs
+++ b/CompressedStaticFiles.AspNet/AlternativeImageFile.cs
@@ -50,7 +50,7 @@ public void Apply(HttpContext context)
         context.Request.Path = new PathString(matchedPath);
         
         //Ensure that a caching proxy knows that it should cache based on the Accept header.
-        context.Response.Headers.Add("Vary", "Accept");
+        context.Response.Headers["Vary"] = "Accept";
     }
 
 
diff --git a/CompressedStaticFiles.AspNet/CompressedAlternativeFile.cs b/CompressedStaticFiles.AspNet/CompressedAlternativeFile.cs
index 8dbf568..565f6c4 100644
--- a/CompressedStaticFiles.AspNet/CompressedAlternativeFile.cs
+++ b/CompressedStaticFiles.AspNet/CompressedAlternativeFile.cs
@@ -55,7 +55,7 @@ public void Prepare(IContentTypeProvider contentTypeProvider, StaticFileResponse
                 if (contentTypeProvider.TryGetContentType(staticFileResponseContext.File.PhysicalPath.Remove(
                     staticFileResponseContext.File.PhysicalPath.Length - fileExtension.Length, fileExtension.Length), out var contentType))
                     staticFileResponseContext.Context.Response.ContentType = contentType;
-                staticFileResponseContext.Context.Response.Headers.Add("Content-Encoding", new[] { compressionType });
+                staticFileResponseContext.Context.Response.Headers["Content-Encoding"] = new[] { compressionType };
             }
         }
     }
diff --git a/ReleaseNotes.md b/ReleaseNotes.md
index e6ee1bf..afbc2cd 100644
--- a/ReleaseNotes.md
+++ b/ReleaseNotes.md
@@ -5,6 +5,19 @@ title: ReleaseNotes
 # Release Notes
 
 
+#### [2.1.0](https://github.com/Material-Blazor/CompressedStaticFiles.AspNet/tree/2.1.0)
+
+Released 2024-03-13
+
+**Updates**
+- .Net 8.0.3
+- Dependabot updates
+- Support added for zstd compression (Thanks to a contribution from Jeremy Kescher)
+
+**Breaking Changes**
+
+**Known issues**
+
 #### [2.0.0](https://github.com/Material-Blazor/CompressedStaticFiles.AspNet/tree/2.0.0)
 
 Released 2023-11-14