diff --git a/src/NSubstitute/NSubstitute.csproj b/src/NSubstitute/NSubstitute.csproj
index 20db4d49..885a819f 100644
--- a/src/NSubstitute/NSubstitute.csproj
+++ b/src/NSubstitute/NSubstitute.csproj
@@ -50,11 +50,11 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Castle.Core" Version="5.1.1" />
+    <PackageReference Include="Castle.Core" Version="5.2.1" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
-    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.4" />
+    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.6.3" />
   </ItemGroup>
 
 </Project>
diff --git a/tests/NSubstitute.Benchmarks/NSubstitute.Benchmarks.csproj b/tests/NSubstitute.Benchmarks/NSubstitute.Benchmarks.csproj
index 11a930be..dc6166df 100644
--- a/tests/NSubstitute.Benchmarks/NSubstitute.Benchmarks.csproj
+++ b/tests/NSubstitute.Benchmarks/NSubstitute.Benchmarks.csproj
@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="BenchmarkDotNet" Version="0.15.0" />
+    <PackageReference Include="BenchmarkDotNet" Version="0.15.2" />
   </ItemGroup>
 
   <ItemGroup>