diff -r -u libcgi-1.0_back/src/session.c libcgi-1.0/src/session.c
--- libcgi-1.0_back/src/session.c	2024-10-24 13:02:58.302808361 +0800
+++ libcgi-1.0/src/session.c	2024-10-24 13:04:34.088241739 +0800
@@ -613,7 +613,7 @@
 		return SESS_NO_ACCESS_TIME;
 	}
 
-	last_time = (time_t)atol(value);
+	last_time = (time_t)atoll(value);
 
 	if (cur_tv.tv_sec - last_time > MAX_SESSION_TIMEOUT) {
 		cgi_session_destroy();
@@ -622,7 +622,7 @@
 
 	//refresh last access time
 	memset(tmp, 0, TMP_BUF_MAX);
-	snprintf(tmp, TMP_BUF_MAX - 1, "%u", cur_tv.tv_sec );
+	snprintf(tmp, TMP_BUF_MAX - 1, "%lld", cur_tv.tv_sec );
 	if ( cgi_session_alter_var(LAST_ACCESS_TIME, tmp)) {
 		return SESS_VALID;
 	}