diff --git a/s3.sh b/s3.sh
index b7ea9ac..363c325 100755
--- a/s3.sh
+++ b/s3.sh
@@ -8,5 +8,5 @@ fi
 
 [[ ! -d "${TUNASYNC_WORKING_DIR}" ]] && mkdir -p "${TUNASYNC_WORKING_DIR}"
 mkdir /tmp/none; cd /tmp/none # enter an empty folder, so the stars in TUNASYNC_AWS_OPTIONS are not expanded
-exec aws --no-sign-request ${ENDPOINT} s3 sync ${TUNASYNC_AWS_OPTIONS} "${TUNASYNC_UPSTREAM_URL}" "${TUNASYNC_WORKING_DIR}"
+exec aws --no-sign-request ${ENDPOINT} s3 sync --exact-timestamps ${TUNASYNC_AWS_OPTIONS} "${TUNASYNC_UPSTREAM_URL}" "${TUNASYNC_WORKING_DIR}"