diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2cebf9c..efac06d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -60,9 +60,9 @@ foreach(_file ${TS_FILES})
     get_filename_component(qm_dir  ${_rfile} DIRECTORY )
     get_filename_component(qm_name  ${_rfile} NAME_WE    )
     set(_qm ${qm_dir}/${qm_name}.qm)
-    add_custom_command(TARGET ${PROJECT_NAME} PRE_BUILD COMMAND ${POWERSHELL_PATH} "cp -Force" ${backup} ${_rfile})
+    add_custom_command(TARGET ${PROJECT_NAME} PRE_BUILD COMMAND ${POWERSHELL_PATH} "cp -force" ${backup} ${_rfile})
     add_custom_command(TARGET ${PROJECT_NAME} PRE_BUILD COMMAND ${Qt5_LRELEASE_EXECUTABLE} ARGS ${_rfile} -qm ${_qm} )
-    add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD COMMAND ${POWERSHELL_PATH}  " cp -Force" ${_rfile} ${backup})
+    add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD COMMAND ${POWERSHELL_PATH}  " cp -force" ${_rfile} ${backup})
 endforeach()