diff --git a/demo/CMakeLists.txt b/demo/CMakeLists.txt
index 2a02835..46f5e2e 100644
--- a/demo/CMakeLists.txt
+++ b/demo/CMakeLists.txt
@@ -19,8 +19,32 @@ if (WIN32)
     target_compile_definitions(${TARGET_NAME} PRIVATE NOMINMAX)
     # Deployment: On Windows, copy the Slint DLL next to the application binary so that it's found.
     add_custom_command(TARGET ${TARGET_NAME} POST_BUILD
-        COMMAND ${CMAKE_COMMAND} -E copy
+        COMMAND ${CMAKE_COMMAND} -E copy_if_different
         $<TARGET_RUNTIME_DLLS:${TARGET_NAME}>
         $<TARGET_FILE_DIR:${TARGET_NAME}> COMMAND_EXPAND_LISTS
     )
+    # Deployment: On Windows, copy the mosquitto DLLs next to the application binary so that they're found.
+    # TODO -> this can probably be dropped in case we add all mosquitto dlls to TARGET_RUNTIME_DLLS
+    if (BUILD_INTEGRATION_MQTT)
+        add_custom_command(TARGET ${TARGET_NAME} POST_BUILD
+            COMMAND ${CMAKE_COMMAND} -E copy_if_different
+                "C:/Program Files/mosquitto/mosquitto.dll"
+                $<TARGET_FILE_DIR:${TARGET_NAME}>)
+        add_custom_command(TARGET ${TARGET_NAME} POST_BUILD
+            COMMAND ${CMAKE_COMMAND} -E copy_if_different
+                "C:/Program Files/mosquitto/mosquittopp.dll"
+                $<TARGET_FILE_DIR:${TARGET_NAME}>)
+        add_custom_command(TARGET ${TARGET_NAME} POST_BUILD
+            COMMAND ${CMAKE_COMMAND} -E copy_if_different
+                "C:/Program Files/mosquitto/libcrypto-3-x64.dll"
+                $<TARGET_FILE_DIR:${TARGET_NAME}>)
+        add_custom_command(TARGET ${TARGET_NAME} POST_BUILD
+            COMMAND ${CMAKE_COMMAND} -E copy_if_different
+                "C:/Program Files/mosquitto/libssl-3-x64.dll"
+                $<TARGET_FILE_DIR:${TARGET_NAME}>)
+        add_custom_command(TARGET ${TARGET_NAME} POST_BUILD
+            COMMAND ${CMAKE_COMMAND} -E copy_if_different
+                "C:/Program Files/mosquitto/pthreadVC3.dll"
+                $<TARGET_FILE_DIR:${TARGET_NAME}>)
+    endif()
 endif()