diff --git a/Ical.Net.Benchmarks/Ical.Net.Benchmarks.csproj b/Ical.Net.Benchmarks/Ical.Net.Benchmarks.csproj
index 845b39aa..14357799 100644
--- a/Ical.Net.Benchmarks/Ical.Net.Benchmarks.csproj
+++ b/Ical.Net.Benchmarks/Ical.Net.Benchmarks.csproj
@@ -6,7 +6,7 @@
         <LangVersion>latest</LangVersion>
     </PropertyGroup>
     <ItemGroup>
-        <PackageReference Include="BenchmarkDotNet" Version="0.14.0" />
+        <PackageReference Include="BenchmarkDotNet" Version="0.15.1" />
         <PackageReference Include="Microsoft.CodeAnalysis.NetAnalyzers" Version="9.0.0" PrivateAssets="all" />
     </ItemGroup>
     <ItemGroup>
diff --git a/Ical.Net.Tests/Ical.Net.Tests.csproj b/Ical.Net.Tests/Ical.Net.Tests.csproj
index a6cb41c8..5485558d 100644
--- a/Ical.Net.Tests/Ical.Net.Tests.csproj
+++ b/Ical.Net.Tests/Ical.Net.Tests.csproj
@@ -11,11 +11,11 @@
         <NoWarn>$(NoWarn);CS8600;CS8601;CS8602;CS8603;CS8604;CS8618;CS8620;CS8714</NoWarn>
     </PropertyGroup>
     <ItemGroup>
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
-        <PackageReference Include="NUnit" Version="4.2.2" />
-        <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
+        <PackageReference Include="NUnit" Version="4.3.2" />
+        <PackageReference Include="NUnit3TestAdapter" Version="5.0.0" />
         <PackageReference Include="Microsoft.CodeAnalysis.NetAnalyzers" Version="9.0.0" PrivateAssets="all" />
-        <PackageReference Include="NUnit.Analyzers" Version="4.3.0">
+        <PackageReference Include="NUnit.Analyzers" Version="4.8.1">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
diff --git a/Ical.Net/Ical.Net.csproj b/Ical.Net/Ical.Net.csproj
index 08627e3e..2d4e5b64 100644
--- a/Ical.Net/Ical.Net.csproj
+++ b/Ical.Net/Ical.Net.csproj
@@ -7,11 +7,11 @@
         <LangVersion>latest</LangVersion>
     </PropertyGroup>
     <ItemGroup>
-        <PackageReference Include="NodaTime" Version="3.2.0" />
+        <PackageReference Include="NodaTime" Version="3.2.2" />
         <PackageReference Include="Microsoft.CodeAnalysis.NetAnalyzers" Version="9.0.0" PrivateAssets="all" />
     </ItemGroup>
     <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0' OR '$(TargetFramework)' == 'netstandard2.1'">
-        <PackageReference Include="Portable.System.DateTimeOnly" Version="8.0.1" />
+        <PackageReference Include="Portable.System.DateTimeOnly" Version="9.0.0" />
     </ItemGroup>
     <ItemGroup>
         <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleToAttribute">