diff --git a/MatterControl.csproj b/MatterControl.csproj
index c93b58b9a..fb261bb11 100644
--- a/MatterControl.csproj
+++ b/MatterControl.csproj
@@ -731,12 +731,6 @@
     <PackageReference Include="MIConvexHull" Version="1.1.17.1019" />
     <PackageReference Include="Mindscape.Raygun4Net" Version="5.5.2" />
     <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
-    <PackageReference Include="System.Reactive" Version="3.1.1" />
-    <PackageReference Include="System.Reactive.Core" Version="3.1.1" />
-    <PackageReference Include="System.Reactive.Interfaces" Version="3.1.1" />
-    <PackageReference Include="System.Reactive.Linq" Version="3.1.1" />
-    <PackageReference Include="System.Reactive.PlatformServices" Version="3.1.1" />
-    <PackageReference Include="System.Reactive.Windows.Threading" Version="3.1.1" />
     <PackageReference Include="Zeroconf" Version="2.9.0" />
   </ItemGroup>
   <PropertyGroup>