diff --git a/include/applet/crontab.h b/include/applet/crontab.h
index 46ce7a5..ce583e5 100644
--- a/include/applet/crontab.h
+++ b/include/applet/crontab.h
@@ -4,6 +4,7 @@
 #include "config.h"
 #include "process.h"
 
+void assets_free(assets_config *info);
 process* assets_load(assets_config *info);
 
 #endif
diff --git a/include/utils/logger.h b/include/utils/logger.h
index eb2fffd..06ee3b7 100644
--- a/include/utils/logger.h
+++ b/include/utils/logger.h
@@ -18,7 +18,6 @@ enum {
 #define log_fatal(...) log_printf(LOG_FATAL, __VA_ARGS__)
 
 extern int LOG_LEVEL;
-//void log_perror(char *prefix);
 void log_perror(const char *fmt, ...);
 void log_printf(int level, const char *fmt, ...);
 
diff --git a/include/utils/process.h b/include/utils/process.h
index 8fb82fd..7a04f92 100644
--- a/include/utils/process.h
+++ b/include/utils/process.h
@@ -9,8 +9,6 @@ typedef struct {
     char **cmd;
     char **env;
     char *cwd;
-    // TODO: add is_daemon option
-    int8_t is_group; // bool value
 } process;
 
 void process_list_run();
@@ -21,5 +19,6 @@ process* process_init(const char *caption, const char *bin);
 
 #include <unistd.h>
 void process_exec(process *proc);
+void process_list_daemon();
 
 #endif
diff --git a/src/applet/crontab.c b/src/applet/crontab.c
index faa91d7..3d19e75 100644
--- a/src/applet/crontab.c
+++ b/src/applet/crontab.c
@@ -1,23 +1,42 @@
 #include <stdlib.h>
-#include "process.h"
+#include <signal.h>
 #include "config.h"
 #include "logger.h"
 #include "sundry.h"
 #include "system.h"
+#include "process.h"
+#include "structure.h"
 
-process* assets_load(assets_config *info) { // load assets update options
-    log_info("assets test ok");
+char **update_file;
+char **update_url;
 
-    // TODO: update assets process
-    // TODO: save cron exp in `/var/spool/cron/crontabs/root`
+void assets_update() { // update all assets
+    log_info("Start assets update");
+    for (char **file = update_file; *file != NULL; ++file) {
+        char **url = file - update_file + update_url;
+        log_info("Update asset `%s` -> %s", *file, *url);
+    }
+}
 
-    char *cron = string_join(info->cron, " kill -14 1");
+void assets_free(assets_config *info) {
+    string_list_free(info->update_file);
+    string_list_free(info->update_url);
+    free(info->cron);
+    free(info);
+}
 
-    log_info("Crontab exp -> `%s`", cron);
+process* assets_load(assets_config *info) { // load assets update options
+    update_url = string_list_init();
+    update_file = string_list_init();
+    string_list_update(&update_url, info->update_url);
+    string_list_update(&update_file, info->update_file);
+    signal(SIGALRM, assets_update); // receive SIGALRM signal
 
+    char *cron = string_join(info->cron, " kill -14 1");
     save_file("/var/spool/cron/crontabs/root", cron);
-
     free(cron);
 
-    return process_init("Crontab", "crond");
+    process *proc = process_init("Crontab", "crond");
+    process_add_arg(proc, "-f"); // foreground
+    return proc;
 }
diff --git a/src/cleardns.c b/src/cleardns.c
index 7ed6548..c1d63ef 100644
--- a/src/cleardns.c
+++ b/src/cleardns.c
@@ -41,48 +41,17 @@ char* init(int argc, char *argv[]) { // return config file
     return config;
 }
 
-void signal_test() {
-    log_info("Get alarm signal");
-}
-
 int main(int argc, char *argv[]) { // ClearDNS service
-
     char *config_file = init(argc, argv);
 
     LOG_LEVEL = LOG_DEBUG;
-    log_info("ClearDNS server start (%s)", VERSION);
-
-    signal(SIGALRM, signal_test);
-
-    assets_config demo;
-    demo.cron = "* * * * *";
-    process *crontab = assets_load(&demo);
-    process_exec(crontab);
-
-    for (;;) {
-        pause();
-    }
-    return 0;
-
-//    process *test = process_init("TEST", "lls");
-//    process *test = process_init("TEST", "ls");
-//    process_add_arg(test, "-al");
-//    test->cwd = "/etc/cleardns/fuck";
-//    int pid = process_exec(test);
-//    log_info("PID = %d", pid);
-
-//    int status;
-//    wait(&status);
-//    return 0;
 
+    log_info("ClearDNS server start (%s)", VERSION);
     create_folder(WORK_DIR);
-
     extract_assets();
     load_config(config_file);
     free(config_file);
 
-    assets_load(loader.assets);
-
     if (LOG_LEVEL == LOG_DEBUG) { // debug mode enabled
         loader.filter->debug = TRUE;
         loader.diverter->debug = TRUE;
@@ -91,31 +60,27 @@ int main(int argc, char *argv[]) { // ClearDNS service
     }
 
     process_list_init();
-
-    // TODO: crontab of assets
-//    process_list_append(assets_load(loader.assets));
-    // TODO: free assets_config
-
+    process_list_append(assets_load(loader.assets));
     process_list_append(dnsproxy_load("Domestic", loader.domestic, "domestic.json"));
     process_list_append(dnsproxy_load("Foreign", loader.foreign, "foreign.json"));
     process_list_append(overture_load(loader.diverter, "overture.json"));
     overture_free(loader.diverter);
     dnsproxy_free(loader.domestic);
     dnsproxy_free(loader.foreign);
+    assets_free(loader.assets);
     if (loader.filter != NULL) {
         process_list_append(adguard_load(loader.filter, ADGUARD_DIR));
         adguard_free(loader.filter);
     }
-    for (char **script = loader.script; *script != NULL; ++script) {
+
+    for (char **script = loader.script; *script != NULL; ++script) { // run custom script
         log_info("Run custom script -> `%s`", *script);
         run_command(*script);
     }
     string_list_free(loader.script);
 
     process_list_run();
-
-    int status;
-    wait(&status);
-
+    kill(1, SIGALRM); // send alarm signal to itself
+    process_list_daemon();
     return 0;
 }
diff --git a/src/utils/assets.c b/src/utils/assets.c
index 111e33d..28044cb 100644
--- a/src/utils/assets.c
+++ b/src/utils/assets.c
@@ -8,8 +8,6 @@
 
 void extract_asset(const char *file);
 
-// TODO: assets update -> crontab task
-
 void extract_assets() {
     log_info("Start loading assets");
     create_folder(ASSETS_DIR);
diff --git a/src/utils/logger.c b/src/utils/logger.c
index 944153f..afdd29c 100644
--- a/src/utils/logger.c
+++ b/src/utils/logger.c
@@ -51,15 +51,6 @@ void log_printf(int level, const char *fmt, ...) {
     }
 }
 
-//void log_perror(char *prefix) {
-//    fprint_prefix();
-//    fprintf(stderr, " %s%s\x1b[0m ", log_color[LOG_ERROR], log_string[LOG_ERROR]);
-//    fflush(stderr);
-//    perror(prefix);
-//}
-
-// TODO: update perror logger
-
 void log_perror(const char *fmt, ...) {
     va_list ap;
     va_start(ap, fmt);
diff --git a/src/utils/process.c b/src/utils/process.c
index fd9f617..93d7603 100644
--- a/src/utils/process.c
+++ b/src/utils/process.c
@@ -3,7 +3,7 @@
 #include <sys/wait.h>
 #include <sys/types.h>
 #include <sys/prctl.h>
-#include <stdio.h>
+//#include <stdio.h>
 #include "sundry.h"
 #include "process.h"
 #include "constant.h"
@@ -20,7 +20,6 @@ process* process_init(const char *caption, const char *bin) { // init process st
     string_list_append(&proc->cmd, bin); // argv[0] normally be process file name
     proc->env = string_list_init(); // empty environment variable
     proc->cwd = WORK_DIR; // current working directory
-    proc->is_group = FALSE; // create new process group
     return proc;
 }
 
@@ -85,7 +84,7 @@ void process_dump(process *proc) {
     log_debug("%s cwd -> %s", proc->name, proc->cwd);
     log_debug("%s command -> %s", proc->name, process_cmd);
     log_debug("%s env variable -> %s", proc->name, process_env);
-    log_debug("%s new group -> %s", proc->name, show_bool(proc->is_group));
+//    log_debug("%s new group -> %s", proc->name, show_bool(proc->is_group));
     free(process_env);
     free(process_cmd);
 }
@@ -103,9 +102,9 @@ void process_exec(process *proc) {
     } else if (pid == 0) { // child process
 
         // TODO: new process group
-        if (proc->is_group) {
-            setpgrp(); // new process group
-        }
+//        if (proc->is_group) {
+//            setpgrp(); // new process group
+//        }
 
         if (chdir(proc->cwd)) { // change working directory
             log_perror("%s with invalid cwd `%s` -> ", proc->name, proc->cwd);
@@ -124,3 +123,8 @@ void process_exec(process *proc) {
 
 }
 
+void process_list_daemon() {
+    int status;
+    wait(&status);
+}
+