diff --git a/singleheader/amalgamate.sh b/singleheader/amalgamate.sh
index 5b9cc723..a71f565d 100755
--- a/singleheader/amalgamate.sh
+++ b/singleheader/amalgamate.sh
@@ -127,8 +127,8 @@ echo "/* auto-generated on ${timestamp}. Do not edit! */" > ${AMAL_C}
     done
 } >> ${AMAL_C}
 
-cp -u "${SCRIPTPATH}/amalgamate_demo.cpp" "${DEMOCPP}" 2>/dev/null
-cp -u "${SCRIPTPATH}/README.md" "${README}" 2>/dev/null
+cp -f "${SCRIPTPATH}/amalgamate_demo.cpp" "${DEMOCPP}"
+cp -f "${SCRIPTPATH}/README.md" "${README}"
 
 echo "Done with all files generation."