diff --git a/CommandLine.nuspec b/CommandLine.nuspec
index 86eb1a0c..4b2baae7 100644
--- a/CommandLine.nuspec
+++ b/CommandLine.nuspec
@@ -30,6 +30,8 @@
         <dependency id="System.Runtime" version="4.1.0-rc2-24027" />
         <dependency id="System.Runtime.Extensions" version="4.1.0-rc2-24027" />
       </group>
+      <group targetFramework=".NETFramework4.0" />
+      <group targetFramework=".NETFramework4.5" />
     </dependencies>
   </metadata>
   <files>