diff --git a/sample/WebOptimizer.Less.Sample.csproj b/sample/WebOptimizer.Less.Sample.csproj
index f0f88b4..15a3799 100644
--- a/sample/WebOptimizer.Less.Sample.csproj
+++ b/sample/WebOptimizer.Less.Sample.csproj
@@ -5,7 +5,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.0" />
+    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.9" />
   </ItemGroup>
 
   <ItemGroup>