diff --git a/Directory.Build.props b/Directory.Build.props
index ce00ccbc..1a60dc85 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -4,7 +4,7 @@
   </PropertyGroup>
 
   <PropertyGroup Label="Target Platforms" >
-    <LatestSupportedDotNetVersion>net8.0</LatestSupportedDotNetVersion>
+    <LatestSupportedDotNetVersion>net9.0</LatestSupportedDotNetVersion>
     <OldestSupportedDotNetVersion>net8.0</OldestSupportedDotNetVersion>
     <NetCoreVersions>$(LatestSupportedDotNetVersion)</NetCoreVersions>
     <NetCoreVersions Condition="'$(LatestSupportedDotNetVersion)' != '$(OldestSupportedDotNetVersion)'">$(LatestSupportedDotNetVersion);$(OldestSupportedDotNetVersion)</NetCoreVersions>
diff --git a/tests/Diagnostics.HealthChecks.UnitTests/CertificatesValidityHealthCheckTests.cs b/tests/Diagnostics.HealthChecks.UnitTests/CertificatesValidityHealthCheckTests.cs
index 0a66ce1e..0f89dfd8 100644
--- a/tests/Diagnostics.HealthChecks.UnitTests/CertificatesValidityHealthCheckTests.cs
+++ b/tests/Diagnostics.HealthChecks.UnitTests/CertificatesValidityHealthCheckTests.cs
@@ -122,7 +122,12 @@ public async Task CheckHealthAsync_ShouldReturnUnhealthy_WhenCertificateNotYetVa
 		[TestMethod]
 		public async Task CheckHealthAsync_ShouldReturnUnhealthy_WhenCertificateDoesNotHavePrivateKey()
 		{
+#if NET9_0
+			X509Certificate2 certWithoutPrivateKey = X509CertificateLoader.LoadCertificate(CreateCert(m_certSubjectName).Export(X509ContentType.Cert));
+#else
 			X509Certificate2 certWithoutPrivateKey = new(CreateCert(m_certSubjectName).Export(X509ContentType.Cert));
+#endif
+
 			m_certificateReaderMock.Setup(m => m.GetCertificateByCommonName(It.IsAny<string>(), It.IsAny<bool>(), It.IsAny<StoreName>()))
 				.Returns(certWithoutPrivateKey);