diff --git a/src/runtime/Python.Runtime.csproj b/src/runtime/Python.Runtime.csproj
index c58dc7483..5a8c35f49 100644
--- a/src/runtime/Python.Runtime.csproj
+++ b/src/runtime/Python.Runtime.csproj
@@ -51,7 +51,6 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="System.Security.Permissions" Version="4.4.0" />
     <PackageReference Include="System.Reflection.Emit" Version="4.3.0" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="All" />
   </ItemGroup>
diff --git a/src/runtime/propertyobject.cs b/src/runtime/propertyobject.cs
index 3cef84a09..fccd8edd6 100644
--- a/src/runtime/propertyobject.cs
+++ b/src/runtime/propertyobject.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Reflection;
-using System.Security.Permissions;
 
 namespace Python.Runtime
 {
@@ -15,7 +14,6 @@ internal class PropertyObject : ExtensionType
         private MaybeMethodInfo getter;
         private MaybeMethodInfo setter;
 
-        [StrongNameIdentityPermission(SecurityAction.Assert)]
         public PropertyObject(PropertyInfo md)
         {
             getter = md.GetGetMethod(true);