diff --git a/deploy/routeros.sh b/deploy/routeros.sh
index d1779b8d..90f0ad1a 100644
--- a/deploy/routeros.sh
+++ b/deploy/routeros.sh
@@ -137,7 +137,8 @@ routeros_deploy() {
     return $_err_code
   fi
 
-  DEPLOY_SCRIPT_CMD="/system script add name=\"LECertDeploy-$_cdomain\" owner=$ROUTER_OS_USERNAME \
+  DEPLOY_SCRIPT_CMD=":do {/system script remove \"LECertDeploy-$_cdomain\" } on-error={ }; \
+/system script add name=\"LECertDeploy-$_cdomain\" owner=$ROUTER_OS_USERNAME \
 comment=\"generated by routeros deploy script in acme.sh\" \
 source=\"/certificate remove [ find name=$_cdomain.cer_0 ];\
 \n/certificate remove [ find name=$_cdomain.cer_1 ];\
@@ -146,8 +147,8 @@ source=\"/certificate remove [ find name=$_cdomain.cer_0 ];\
 \n/certificate import file-name=$_cdomain.cer passphrase=\\\"\\\";\
 \n/certificate import file-name=$_cdomain.key passphrase=\\\"\\\";\
 \ndelay 1;\
-\n/file remove $_cdomain.cer;\
-\n/file remove $_cdomain.key;\
+\n:do {/file remove $_cdomain.cer; } on-error={ }\
+\n:do {/file remove $_cdomain.key; } on-error={ }\
 \ndelay 2;\
 \n/ip service set www-ssl certificate=$_cdomain.cer_0;\
 \n$ROUTER_OS_ADDITIONAL_SERVICES;\