diff --git a/install-release.sh b/install-release.sh
index c7fc176..5715903 100644
--- a/install-release.sh
+++ b/install-release.sh
@@ -372,7 +372,7 @@ install_startup_service_file() {
   mkdir -p '/etc/systemd/system/v2ray.service.d'
   mkdir -p '/etc/systemd/system/v2ray@.service.d/'
   if [[ -n "$JSONS_PATH" ]]; then
-    "rm" "-f" '/etc/systemd/system/v2ray.service.d/10-donot_touch_single_conf.conf' \
+    "rm" -f '/etc/systemd/system/v2ray.service.d/10-donot_touch_single_conf.conf' \
       '/etc/systemd/system/v2ray@.service.d/10-donot_touch_single_conf.conf'
     echo "# In case you have a good reason to do so, duplicate this file in the same directory and make your customizes there.
 # Or all changes you made will be lost!  # Refer: https://www.freedesktop.org/software/systemd/man/systemd.unit.html
@@ -382,7 +382,7 @@ ExecStart=/usr/local/bin/v2ray -confdir $JSONS_PATH" |
       tee '/etc/systemd/system/v2ray.service.d/10-donot_touch_multi_conf.conf' > \
         '/etc/systemd/system/v2ray@.service.d/10-donot_touch_multi_conf.conf'
   else
-    "rm" "-f" '/etc/systemd/system/v2ray.service.d/10-donot_touch_multi_conf.conf' \
+    "rm" -f '/etc/systemd/system/v2ray.service.d/10-donot_touch_multi_conf.conf' \
       '/etc/systemd/system/v2ray@.service.d/10-donot_touch_multi_conf.conf'
     echo "# In case you have a good reason to do so, duplicate this file in the same directory and make your customizes there.
 # Or all changes you made will be lost!  # Refer: https://www.freedesktop.org/software/systemd/man/systemd.unit.html