diff --git a/2.1/src/hostingstart.csproj b/2.1/src/hostingstart.csproj
index f09851a..37eda1c 100644
--- a/2.1/src/hostingstart.csproj
+++ b/2.1/src/hostingstart.csproj
@@ -9,7 +9,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.1.2" />
+    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.1.21" />
   </ItemGroup>
 
 </Project>