diff --git a/test/MongoDB.Messaging.Tests/MongoDB.Messaging.Tests.csproj b/test/MongoDB.Messaging.Tests/MongoDB.Messaging.Tests.csproj
index 4cdd624..efc4ca3 100644
--- a/test/MongoDB.Messaging.Tests/MongoDB.Messaging.Tests.csproj
+++ b/test/MongoDB.Messaging.Tests/MongoDB.Messaging.Tests.csproj
@@ -9,7 +9,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.7.2" />
     <PackageReference Include="DataGenerator" Version="4.0.0.19" />
-    <PackageReference Include="FluentAssertions" Version="5.3.2" />
+    <PackageReference Include="FluentAssertions" Version="5.9.0" />
     <PackageReference Include="MongoDB.Driver" Version="2.6.1" />
     <PackageReference Include="NLog" Version="4.5.6" />
     <PackageReference Include="xunit" Version="2.3.1" />