diff --git a/src/lib/platform/MSWindowsClipboard.cpp b/src/lib/platform/MSWindowsClipboard.cpp
index bcee64b2a..9e4b9a57a 100644
--- a/src/lib/platform/MSWindowsClipboard.cpp
+++ b/src/lib/platform/MSWindowsClipboard.cpp
@@ -125,6 +125,7 @@ bool MSWindowsClipboard::open(Time time) const
 
   for (int i = 0; i < kMaxRetries; ++i) {
     if (OpenClipboard(m_window)) {
+      std::scoped_lock lock{m_mutex};
       m_time = time;
       return true;
     }
@@ -147,6 +148,7 @@ void MSWindowsClipboard::close() const
 
 IClipboard::Time MSWindowsClipboard::getTime() const
 {
+  std::scoped_lock lock{m_mutex};
   return m_time;
 }
 
diff --git a/src/lib/platform/MSWindowsClipboard.h b/src/lib/platform/MSWindowsClipboard.h
index c1c3557ac..601a60b82 100644
--- a/src/lib/platform/MSWindowsClipboard.h
+++ b/src/lib/platform/MSWindowsClipboard.h
@@ -10,6 +10,7 @@
 
 #include "deskflow/IClipboard.h"
 
+#include <mutex>
 #include <vector>
 
 #define WIN32_LEAN_AND_MEAN
@@ -68,6 +69,7 @@ private:
   using ConverterList = std::vector<IMSWindowsClipboardConverter *>;
 
   HWND m_window;
+  mutable std::mutex m_mutex;
   mutable Time m_time;
   ConverterList m_converters;
   static UINT s_ownershipFormat;