diff --git a/tests/Magick.NET.Tests/Magick.NET.Tests.csproj b/tests/Magick.NET.Tests/Magick.NET.Tests.csproj
index 6ad544f6e0..d35d0841dd 100644
--- a/tests/Magick.NET.Tests/Magick.NET.Tests.csproj
+++ b/tests/Magick.NET.Tests/Magick.NET.Tests.csproj
@@ -46,7 +46,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
-    <PackageReference Include="NSubstitute" Version="5.0.0" />
+    <PackageReference Include="NSubstitute" Version="5.1.0" />
     <PackageReference Include="StyleCop.Analyzers" Version="1.2.0-beta.507">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>