diff --git a/PxCoco/PxCoco.csproj b/PxCoco/PxCoco.csproj
index b5f4083..0069ad8 100644
--- a/PxCoco/PxCoco.csproj
+++ b/PxCoco/PxCoco.csproj
@@ -43,8 +43,8 @@ with improvements by Pat Terry, Rhodes University. Prexonite extensions by Chris
 </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Build.Framework" Version="17.5.0" />
-    <PackageReference Include="Microsoft.Build.Utilities.Core" Version="17.4.0" />
+    <PackageReference Include="Microsoft.Build.Framework" Version="17.8.3" />
+    <PackageReference Include="Microsoft.Build.Utilities.Core" Version="17.8.3" />
     <!-- marks all packages as 'local only' so they don't end up in the nuspec -->
     <PackageReference Update="@(PackageReference)" PrivateAssets="All" />
   </ItemGroup>