diff --git a/src/WireMock.Net.Testcontainers/WireMock.Net.Testcontainers.csproj b/src/WireMock.Net.Testcontainers/WireMock.Net.Testcontainers.csproj
index 98e4d3d3..565bdbbc 100644
--- a/src/WireMock.Net.Testcontainers/WireMock.Net.Testcontainers.csproj
+++ b/src/WireMock.Net.Testcontainers/WireMock.Net.Testcontainers.csproj
@@ -39,11 +39,11 @@
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
         <PackageReference Include="Stef.Validation" Version="0.1.1" />
-        <PackageReference Include="Testcontainers" Version="4.0.0" />
+        <PackageReference Include="Testcontainers" Version="4.5.0" />
     </ItemGroup>
 
     <ItemGroup>
       <ProjectReference Include="..\WireMock.Net.RestClient\WireMock.Net.RestClient.csproj" />
     </ItemGroup>
-    
+
 </Project>
\ No newline at end of file
diff --git a/test/WireMock.Net.Tests/Testcontainers/TestcontainersTests.cs b/test/WireMock.Net.Tests/Testcontainers/TestcontainersTests.cs
index 2a219dc9..9e9f7189 100644
--- a/test/WireMock.Net.Tests/Testcontainers/TestcontainersTests.cs
+++ b/test/WireMock.Net.Tests/Testcontainers/TestcontainersTests.cs
@@ -123,7 +123,11 @@ public partial class TestcontainersTests
         }
         finally
         {
-            await wireMockContainer.StopAsync();
+            // Stop the container
+            if(wireMockContainer is not null)
+            {
+                await wireMockContainer.StopAsync();
+            }
         }
     }
 }
diff --git a/test/WireMock.Net.Tests/WireMock.Net.Tests.csproj b/test/WireMock.Net.Tests/WireMock.Net.Tests.csproj
index e097a4a9..3602674f 100644
--- a/test/WireMock.Net.Tests/WireMock.Net.Tests.csproj
+++ b/test/WireMock.Net.Tests/WireMock.Net.Tests.csproj
@@ -102,7 +102,7 @@
     </ItemGroup>
 
     <ItemGroup Condition="'$(TargetFramework)' != 'net452'">
-        <PackageReference Include="System.Net.Http.Json" Version="3.2.1" />
+        <PackageReference Include="System.Net.Http.Json" Version="8.0.1" />
         <PackageReference Include="JsonConverter.System.Text.Json" Version="0.7.0" />
         <PackageReference Include="Google.Protobuf" Version="3.25.1" />
         <PackageReference Include="Grpc.Net.Client" Version="2.60.0" />