To save the json format log in libmodsecurity, i know need to set it as follows: **SecAuditLogType Parallel** ( Parallel configuration is probably the same as setting up Concurrent. ) ( https://github.com/SpiderLabs/ModSecurity/wiki/Reference-Manual#secauditlogtype ) However, when I set it to **SecAuditLogType: Parallel**, SecAuditLogStorageDir setting should be set, so can not logging to one file. So, I set it to **SecAuditLogType: Serial** to logging in one file. Serial can not be saved in Json format. Do you plan to support it? Source Code: https://github.com/SpiderLabs/ModSecurity/blob/v3/master/src/audit_log/writer/serial.cc ==== # https://github.com/SpiderLabs/ModSecurity-nginx/issues/47#issuecomment-309748770