diff --git a/csharp/PhoneNumbers.Demo.Tests/PhoneNumbers.Demo.Tests.csproj b/csharp/PhoneNumbers.Demo.Tests/PhoneNumbers.Demo.Tests.csproj
index 53ca0732..92306a85 100644
--- a/csharp/PhoneNumbers.Demo.Tests/PhoneNumbers.Demo.Tests.csproj
+++ b/csharp/PhoneNumbers.Demo.Tests/PhoneNumbers.Demo.Tests.csproj
@@ -13,7 +13,7 @@
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2" PrivateAssets="all" />
     <PackageReference Include="coverlet.collector" Version="6.0.4" PrivateAssets="all" />
-    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly" Version="10.0.6" />
+    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly" Version="10.0.9" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/csharp/PhoneNumbers.Demo/PhoneNumbers.Demo.csproj b/csharp/PhoneNumbers.Demo/PhoneNumbers.Demo.csproj
index da7fdc78..4f344f27 100644
--- a/csharp/PhoneNumbers.Demo/PhoneNumbers.Demo.csproj
+++ b/csharp/PhoneNumbers.Demo/PhoneNumbers.Demo.csproj
@@ -9,8 +9,8 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly" Version="10.0.6" />
-    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer" Version="10.0.6" PrivateAssets="all" />
+    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly" Version="10.0.9" />
+    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer" Version="10.0.9" PrivateAssets="all" />
   </ItemGroup>
 
   <ItemGroup>