--- a/bmsd/co2meters.c	Mon Dec 02 16:53:56 2019 +0100
+++ b/bmsd/co2meters.c	Mon Dec 02 20:56:01 2019 +0100
@@ -235,9 +235,9 @@
     jobj = json_tokener_parse(payload);
 
     timestamp = time(NULL);
-    log->datetime = malloc(21);
+    log->datetime = malloc(73);
     mytime = localtime(&timestamp);
-    snprintf(log->datetime, 20, "%04d-%02d-%02d %02d:%02d:%02d", 
+    snprintf(log->datetime, 72, "%04d-%02d-%02d %02d:%02d:%02d",
 	mytime->tm_year + 1900, mytime->tm_mon + 1, mytime->tm_mday, mytime->tm_hour, mytime->tm_min, mytime->tm_sec);
 
     if (json_object_object_get_ex(jobj, "metric", &metric)) {