diff --git a/OpenRA.Launcher/OpenRA.Launcher.csproj b/OpenRA.Launcher/OpenRA.Launcher.csproj
index 0099bc5978..6897bc7493 100644
--- a/OpenRA.Launcher/OpenRA.Launcher.csproj
+++ b/OpenRA.Launcher/OpenRA.Launcher.csproj
@@ -69,5 +69,6 @@
     <TrimmerRootAssembly Include="mscorlib" />
     <TrimmerRootAssembly Include="netstandard" />
     <TrimmerRootAssembly Include="System.IO.Pipes" />
+    <TrimmerRootAssembly Include="System.Threading.Tasks.Parallel" />
   </ItemGroup>
 </Project>
diff --git a/OpenRA.WindowsLauncher/OpenRA.WindowsLauncher.csproj b/OpenRA.WindowsLauncher/OpenRA.WindowsLauncher.csproj
index d12d1ca8cb..980b80a9bb 100644
--- a/OpenRA.WindowsLauncher/OpenRA.WindowsLauncher.csproj
+++ b/OpenRA.WindowsLauncher/OpenRA.WindowsLauncher.csproj
@@ -62,5 +62,6 @@
     <TrimmerRootAssembly Include="mscorlib" />
     <TrimmerRootAssembly Include="netstandard" />
     <TrimmerRootAssembly Include="System.IO.Pipes" />
+    <TrimmerRootAssembly Include="System.Threading.Tasks.Parallel" />
   </ItemGroup>
 </Project>