diff --git a/include/constant.h b/include/constant.h
index dc592c0..69441b7 100644
--- a/include/constant.h
+++ b/include/constant.h
@@ -4,9 +4,6 @@
 #define TRUE  1
 #define FALSE 0
 
-#define VERSION "1.3.0-dev"
-#define CONFIG_FILE "cleardns.yml"
-
 #define DNS_PORT      53
 #define ADGUARD_PORT  80
 #define DIVERTER_PORT 5353
@@ -15,6 +12,9 @@
 
 #define DIVERTER_TIMEOUT 6
 
+#define VERSION     "1.3.0-beta"
+#define CONFIG_FILE "cleardns.yml"
+
 #define ADGUARD_USER   "admin"
 #define ADGUARD_PASSWD "cleardns"
 
@@ -37,10 +37,9 @@
 #define ASSET_CHINA_LIST "chinalist.txt"
 
 #define EXIT_NORMAL 0
-#define EXIT_FILE_ERROR 1
-#define EXIT_FORK_ERROR 2
-#define EXIT_EXEC_ERROR 3
-#define EXIT_WAIT_ERROR 4
+#define EXIT_FORK_ERROR 1
+#define EXIT_EXEC_ERROR 2
+#define EXIT_WAIT_ERROR 3
 
 #define HELP_MSG "\
 ClearDNS usage \n\
diff --git a/src/applet/crontab.c b/src/applet/crontab.c
index 01ee399..9aa9604 100644
--- a/src/applet/crontab.c
+++ b/src/applet/crontab.c
@@ -26,9 +26,9 @@ void crontab_dump(crontab *info) { // show crontab options in debug log
 }
 
 process* crontab_load(crontab *info) { // load crontab options
-    // TODO: avoid the case that PID of cleardns is not 1 (docker --pid)
-    char *cron_cmd = string_join(info->cron, " kill -14 1"); // SIGALRM -> 14
-    save_file("/var/spool/cron/crontabs/root", cron_cmd);
+    crontab_dump(info);
+    char *cron_cmd = string_join(info->cron, " kill -14 $(ps -o pid,comm | grep cleardns | awk '{print $1}')");
+    save_file("/var/spool/cron/crontabs/root", cron_cmd); // SIGALRM -> 14
     free(cron_cmd);
 
     process *proc = process_init("Crontab", "crond");
diff --git a/src/utils/process.c b/src/utils/process.c
index 40a61b4..2b69232 100644
--- a/src/utils/process.c
+++ b/src/utils/process.c
@@ -59,12 +59,12 @@ void process_exec(process *proc) {
     } else if (pid == 0) { // child process
         if (chdir(proc->cwd)) { // change working directory
             log_perror("%s with invalid cwd `%s` -> ", proc->name, proc->cwd);
-            exit(2);
+            exit(EXIT_EXEC_ERROR);
         }
         prctl(PR_SET_PDEATHSIG, SIGKILL); // child process die with father process
         if (execvpe(*(proc->cmd), proc->cmd, proc->env) < 0) {
             log_perror("%s exec error -> ", proc->name);
-            exit(1);
+            exit(EXIT_EXEC_ERROR);
         }
     }
     proc->pid = pid;
@@ -146,7 +146,6 @@ void server_exit(int exit_code) { // kill sub process and exit
         log_info("%s exit -> PID = %d", (*proc)->name, ret);
     }
     EXITED = TRUE;
-    log_info("All sub-process exited");
     log_warn("ClearDNS exit");
     exit(exit_code);
 }