diff --git a/src/MaaCore/Controller/Platform/Win32IO.cpp b/src/MaaCore/Controller/Platform/Win32IO.cpp
index e35ecf4418..78466b2c9b 100644
--- a/src/MaaCore/Controller/Platform/Win32IO.cpp
+++ b/src/MaaCore/Controller/Platform/Win32IO.cpp
@@ -542,6 +542,7 @@ std::string asst::IOHandlerWin32::read(unsigned timeout_sec)
         }
     }
 
+    CloseHandle(pipeov.hEvent);
     return pipe_buffer.get();
 }