diff --git a/src/Cake.Issues.PullRequests.GitHubActions.Tests/Cake.Issues.PullRequests.GitHubActions.Tests.csproj b/src/Cake.Issues.PullRequests.GitHubActions.Tests/Cake.Issues.PullRequests.GitHubActions.Tests.csproj
index 273f7fd..09e28e4 100644
--- a/src/Cake.Issues.PullRequests.GitHubActions.Tests/Cake.Issues.PullRequests.GitHubActions.Tests.csproj
+++ b/src/Cake.Issues.PullRequests.GitHubActions.Tests/Cake.Issues.PullRequests.GitHubActions.Tests.csproj
@@ -18,7 +18,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.8.0" />
     <PackageReference Include="Cake.Core" Version="0.33.0" />
     <PackageReference Include="Cake.Testing" Version="0.33.0" />
-    <PackageReference Include="Shouldly" Version="3.0.2" />
+    <PackageReference Include="Shouldly" Version="4.0.0" />
     <PackageReference Include="StyleCop.Analyzers" Version="1.1.118" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3" />