diff --git a/include/common.h b/include/common.h
index 89562ee..d870a4e 100644
--- a/include/common.h
+++ b/include/common.h
@@ -1,7 +1,7 @@
 #ifndef COMMON_H_
 #define COMMON_H_
 
-#define VERSION "1.0.0-beta"
+#define VERSION "1.0.1-beta"
 
 #define RANDOM_PORT_START 41952
 #define RANDOM_PORT_END   65535
diff --git a/include/utils/logger.h b/include/utils/logger.h
index 47f3b6d..ca0415b 100644
--- a/include/utils/logger.h
+++ b/include/utils/logger.h
@@ -1,5 +1,7 @@
-#ifndef LOG_H
-#define LOG_H
+#ifndef LOGGER_H_
+#define LOGGER_H_
+
+#define LOG_PREFIX "Bootstrap"
 
 enum {
     LOG_DEBUG,
@@ -16,7 +18,7 @@ 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, ...);
 
 #endif
diff --git a/src/utils/logger.c b/src/utils/logger.c
index 73b68b5..afdd29c 100644
--- a/src/utils/logger.c
+++ b/src/utils/logger.c
@@ -2,6 +2,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdarg.h>
+#include <sys/time.h>
 #include "logger.h"
 
 int LOG_LEVEL = LOG_INFO; // default log level
@@ -22,36 +23,40 @@ static const char *log_color[] = {
     "\x1b[95m", // fatal
 };
 
+void fprint_prefix() { // print log prefix and time info
+    time_t _time;
+    time(&_time);
+    struct timeval tv;
+    gettimeofday(&tv, NULL);
+    struct tm *t = localtime(&_time);
+    fprintf(stderr, "\x1b[36m[%s]\x1b[0m", LOG_PREFIX);
+    fprintf(stderr, " \x1b[90m%04d-%02d-%02d", t->tm_year + 1900, t->tm_mon + 1, t->tm_mday);
+    fprintf(stderr, " %02d:%02d:%02d.%03ld\x1b[0m", t->tm_hour, t->tm_min, t->tm_sec, tv.tv_usec / 1000);
+}
+
 void log_printf(int level, const char *fmt, ...) {
     if (level < LOG_LEVEL) { // skip low log level
         return;
     }
-    time_t t = time(NULL);
-    char time_str[20]; // YYYY-mm-dd HH:MM:SS (20 bytes)
-    time_str[strftime(time_str, 20, "%Y-%m-%d %H:%M:%S", localtime(&t))] = '\0'; // generate time str
-
     va_list ap;
     va_start(ap, fmt);
-    fprintf(stderr, "\x1b[36m[Bootstrap]\x1b[0m \x1b[90m%s\x1b[0m", time_str); // show log prefix
+    fprint_prefix();
     fprintf(stderr, " %s%s\x1b[0m ", log_color[level], log_string[level]); // show log level
     vfprintf(stderr, fmt, ap); // output log content
     fprintf(stderr, "\n"); // add LF after line
     fflush(stderr);
     va_end(ap);
-
     if (level == LOG_FATAL) {
         exit(1);
     }
 }
 
-void log_perror(char *prefix) {
-    time_t t;
-    time(&t);
-    struct tm *lt = localtime(&t);
-    fprintf(stderr, "\x1b[36m[Bootstrap]\x1b[0m ");
-    fprintf(stderr, "\x1b[90m%04d-%02d-%02d %02d:%02d:%02d\x1b[0m",
-            lt->tm_year + 1900, lt->tm_mon, lt->tm_mday, lt->tm_hour, lt->tm_min, lt->tm_sec);
-    fprintf(stderr, " %s%s\x1b[0m ", log_color[3], log_string[3]); // error level
+void log_perror(const char *fmt, ...) {
+    va_list ap;
+    va_start(ap, fmt);
+    fprint_prefix();
+    fprintf(stderr, " %s%s\x1b[0m ", log_color[LOG_ERROR], log_string[LOG_ERROR]);
+    vfprintf(stderr, fmt, ap); // output log content
     fflush(stderr);
-    perror(prefix);
+    perror("");
 }