diff --git a/src/code/Microsoft.PowerShell.ThreadJob.csproj b/src/code/Microsoft.PowerShell.ThreadJob.csproj
index f6ffa2c..0297dee 100644
--- a/src/code/Microsoft.PowerShell.ThreadJob.csproj
+++ b/src/code/Microsoft.PowerShell.ThreadJob.csproj
@@ -13,7 +13,7 @@
 	
   <ItemGroup>
     <PackageReference Include="PowerShellStandard.Library" Version="5.1.0" PrivateAssets="all" />
-    <PackageReference Include="Microsoft.CSharp" version="4.5.0-*" />
+    <PackageReference Include="Microsoft.CSharp" version="4.7.0" />
   </ItemGroup>
 
 </Project>