diff --git a/Plugins/Flow.Launcher.Plugin.Program/Programs/ApplicationActivationHelper.cs b/Plugins/Flow.Launcher.Plugin.Program/Programs/ApplicationActivationHelper.cs
index 3023836c1..4b8423ed6 100644
--- a/Plugins/Flow.Launcher.Plugin.Program/Programs/ApplicationActivationHelper.cs
+++ b/Plugins/Flow.Launcher.Plugin.Program/Programs/ApplicationActivationHelper.cs
@@ -21,9 +21,9 @@ namespace Flow.Launcher.Plugin.Program.Programs
         [ComImport, Guid("2e941141-7f97-4756-ba1d-9decde894a3d"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
         interface IApplicationActivationManager
         {
-            IntPtr ActivateApplication([In] String appUserModelId, [In] String arguments, [In] ActivateOptions options, [Out] out UInt32 processId);
-            IntPtr ActivateForFile([In] String appUserModelId, [In] IntPtr /*IShellItemArray* */ itemArray, [In] String verb, [Out] out UInt32 processId);
-            IntPtr ActivateForProtocol([In] String appUserModelId, [In] IntPtr /* IShellItemArray* */itemArray, [Out] out UInt32 processId);
+            IntPtr ActivateApplication([In] string appUserModelId, [In] string arguments, [In] ActivateOptions options, [Out] out uint processId);
+            IntPtr ActivateForFile([In] string appUserModelId, [In] IntPtr /*IShellItemArray* */ itemArray, [In] string verb, [Out] out uint processId);
+            IntPtr ActivateForProtocol([In] string appUserModelId, [In] IntPtr /* IShellItemArray* */itemArray, [Out] out uint processId);
         }
 
         // Application Activation Manager Class
@@ -32,13 +32,13 @@ namespace Flow.Launcher.Plugin.Program.Programs
         {
 
             [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)/*, PreserveSig*/]
-            public extern IntPtr ActivateApplication([In] String appUserModelId, [In] String arguments, [In] ActivateOptions options, [Out] out UInt32 processId);
+            public extern IntPtr ActivateApplication([In] string appUserModelId, [In] string arguments, [In] ActivateOptions options, [Out] out uint processId);
 
             [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
-            public extern IntPtr ActivateForFile([In] String appUserModelId, [In] IntPtr /*IShellItemArray* */ itemArray, [In] String verb, [Out] out UInt32 processId);
+            public extern IntPtr ActivateForFile([In] string appUserModelId, [In] IntPtr /*IShellItemArray* */ itemArray, [In] string verb, [Out] out uint processId);
 
             [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
-            public extern IntPtr ActivateForProtocol([In] String appUserModelId, [In] IntPtr /* IShellItemArray* */itemArray, [Out] out UInt32 processId);
+            public extern IntPtr ActivateForProtocol([In] string appUserModelId, [In] IntPtr /* IShellItemArray* */itemArray, [Out] out uint processId);
         }
     }
 }