diff --git a/tests/RP2040.Core.Tests/RP2040.Core.Tests.csproj b/tests/RP2040.Core.Tests/RP2040.Core.Tests.csproj
index acda266..6d713fd 100644
--- a/tests/RP2040.Core.Tests/RP2040.Core.Tests.csproj
+++ b/tests/RP2040.Core.Tests/RP2040.Core.Tests.csproj
@@ -10,7 +10,7 @@
 
   <ItemGroup>
     <PackageReference Include="coverlet.collector" Version="6.0.4" />
-    <PackageReference Include="FluentAssertions" Version="8.8.0" />
+    <PackageReference Include="FluentAssertions" Version="8.9.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5" />