diff --git a/tests/HihaArvio.Tests/HihaArvio.Tests.csproj b/tests/HihaArvio.Tests/HihaArvio.Tests.csproj
index 92da2e1..1caf2b5 100644
--- a/tests/HihaArvio.Tests/HihaArvio.Tests.csproj
+++ b/tests/HihaArvio.Tests/HihaArvio.Tests.csproj
@@ -15,7 +15,7 @@
 
   <ItemGroup>
     <PackageReference Include="coverlet.collector" Version="8.0.0" />
-    <PackageReference Include="FluentAssertions" Version="8.8.0" />
+    <PackageReference Include="FluentAssertions" Version="8.9.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
     <PackageReference Include="NSubstitute" Version="5.3.0" />
     <PackageReference Include="xunit" Version="2.9.3" />