diff --git a/GrasshopperAsyncComponent/GrasshopperAsyncComponent.csproj b/GrasshopperAsyncComponent/GrasshopperAsyncComponent.csproj
index c48c592..d768eff 100755
--- a/GrasshopperAsyncComponent/GrasshopperAsyncComponent.csproj
+++ b/GrasshopperAsyncComponent/GrasshopperAsyncComponent.csproj
@@ -49,11 +49,11 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Grasshopper">
-      <Version>6.33.20343.16431</Version>
+      <Version>6.28.20199.17141</Version>
       <IncludeAssets>compile; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="RhinoCommon">
-      <Version>6.33.20343.16431</Version>
+      <Version>6.28.20199.17141</Version>
       <IncludeAssets>compile; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
   </ItemGroup>
diff --git a/GrasshopperAsyncComponentDemo/GrasshopperAsyncComponentDemo.csproj b/GrasshopperAsyncComponentDemo/GrasshopperAsyncComponentDemo.csproj
index d368a4f..8306573 100644
--- a/GrasshopperAsyncComponentDemo/GrasshopperAsyncComponentDemo.csproj
+++ b/GrasshopperAsyncComponentDemo/GrasshopperAsyncComponentDemo.csproj
@@ -55,8 +55,8 @@
     <Compile Include="SampleImplementations\Sample_UslessCyclesComponent.cs" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="Grasshopper" Version="6.33.20343.16431" />
-    <PackageReference Include="RhinoCommon" Version="6.33.20343.16431" />
+    <PackageReference Include="Grasshopper" Version="6.28.20199.17141" />
+    <PackageReference Include="RhinoCommon" Version="6.28.20199.17141" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\GrasshopperAsyncComponent\GrasshopperAsyncComponent.csproj">