diff --git a/MaxMind.GeoIP2.UnitTests/MaxMind.GeoIP2.UnitTests.csproj b/MaxMind.GeoIP2.UnitTests/MaxMind.GeoIP2.UnitTests.csproj
index 66a42c0..68017f6 100644
--- a/MaxMind.GeoIP2.UnitTests/MaxMind.GeoIP2.UnitTests.csproj
+++ b/MaxMind.GeoIP2.UnitTests/MaxMind.GeoIP2.UnitTests.csproj
@@ -29,7 +29,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
-    <PackageReference Include="WireMock.Net" Version="1.5.39" />
+    <PackageReference Include="WireMock.Net" Version="1.5.40" />
     <PackageReference Include="xunit" Version="2.6.1" />
     <PackageReference Include="xunit.core" Version="2.6.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3">