diff --git a/src/PockyBot.NET.Tests/PockyBot.NET.Tests.csproj b/src/PockyBot.NET.Tests/PockyBot.NET.Tests.csproj
index 9f5b791..c68380c 100644
--- a/src/PockyBot.NET.Tests/PockyBot.NET.Tests.csproj
+++ b/src/PockyBot.NET.Tests/PockyBot.NET.Tests.csproj
@@ -22,7 +22,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.4.1" />
-    <PackageReference Include="NSubstitute" Version="4.4.0" />
+    <PackageReference Include="NSubstitute" Version="5.0.0" />
     <PackageReference Include="Shouldly" Version="4.1.0" />
     <PackageReference Include="TestStack.BDDfy" Version="4.3.2" />
     <PackageReference Include="xunit" Version="2.4.2" />