diff --git a/tests/Serilog.Sinks.Mongodb.TimeSeries.Tests/Serilog.Sinks.Mongodb.TimeSeries.Tests.csproj b/tests/Serilog.Sinks.Mongodb.TimeSeries.Tests/Serilog.Sinks.Mongodb.TimeSeries.Tests.csproj
index fbf4bce..c632e4a 100644
--- a/tests/Serilog.Sinks.Mongodb.TimeSeries.Tests/Serilog.Sinks.Mongodb.TimeSeries.Tests.csproj
+++ b/tests/Serilog.Sinks.Mongodb.TimeSeries.Tests/Serilog.Sinks.Mongodb.TimeSeries.Tests.csproj
@@ -7,7 +7,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="FluentAssertions" Version="6.12.1"/>
+        <PackageReference Include="FluentAssertions" Version="8.0.0"/>
         <PackageReference Include="GitHubActionsTestLogger" Version="2.4.1"/>
         <PackageReference Include="Moq" Version="4.20.72"/>
         <PackageReference Include="nunit" Version="4.2.2"/>