diff -r ee76d0bfcdaf -r a8e065a9f851 bmsd/fermenters.c
--- a/bmsd/fermenters.c	Mon Dec 02 16:53:56 2019 +0100
+++ b/bmsd/fermenters.c	Mon Dec 02 20:56:01 2019 +0100
@@ -444,9 +444,9 @@
 
     if (json_object_object_get_ex(jobj, "timestamp", &val)) {
 	timestamp = json_object_get_int(val);
-    	log->datetime = malloc(21);
+    	log->datetime = malloc(73);
     	mytime = localtime(&timestamp);
-    	snprintf(log->datetime, 20, "%04d-%02d-%02d %02d:%02d:%02d", 
+    	snprintf(log->datetime, 73, "%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);
     }