diff --git a/Assets/uDesktopDuplication/Examples/Scenes/Multiple Monitors Roundly.unity b/Assets/uDesktopDuplication/Examples/Scenes/Multiple Monitors Roundly.unity
index 3c95cc3..178c755 100644
Binary files a/Assets/uDesktopDuplication/Examples/Scenes/Multiple Monitors Roundly.unity and b/Assets/uDesktopDuplication/Examples/Scenes/Multiple Monitors Roundly.unity differ
diff --git a/Assets/uDesktopDuplication/Plugins/x86_64/uDesktopDuplication.dll b/Assets/uDesktopDuplication/Plugins/x86_64/uDesktopDuplication.dll
index fa7bc5e..7de5804 100644
Binary files a/Assets/uDesktopDuplication/Plugins/x86_64/uDesktopDuplication.dll and b/Assets/uDesktopDuplication/Plugins/x86_64/uDesktopDuplication.dll differ
diff --git a/Plugins/uDesktopDuplication/uDesktopDuplication/Monitor.cpp b/Plugins/uDesktopDuplication/uDesktopDuplication/Monitor.cpp
index d515547..0875412 100644
--- a/Plugins/uDesktopDuplication/uDesktopDuplication/Monitor.cpp
+++ b/Plugins/uDesktopDuplication/uDesktopDuplication/Monitor.cpp
@@ -30,15 +30,15 @@ void Monitor::Initialize(IDXGIOutput* output)
     auto output1 = reinterpret_cast<IDXGIOutput1*>(output);
     IDXGIOutputDuplication* deskDupl;
     const auto hr = output1->DuplicateOutput(GetDevice(), &deskDupl);
-    deskDupl_ = std::shared_ptr<IDXGIOutputDuplication>(
-        deskDupl,
-        [](IDXGIOutputDuplication* ptr) { ptr->Release(); });
 
     // TODO: error check
     switch (hr)
     {
         case S_OK:
             state_ = State::Available;
+            deskDupl_ = std::shared_ptr<IDXGIOutputDuplication>(
+                deskDupl,
+                [](IDXGIOutputDuplication* ptr) { if (ptr != nullptr) ptr->Release(); });
             break;
         case E_INVALIDARG:
             state_ = State::InvalidArg;