diff --git a/rel/i18n/emqx_conf_schema.hocon b/rel/i18n/emqx_conf_schema.hocon
index e26a21fa0..c6e3036b1 100644
--- a/rel/i18n/emqx_conf_schema.hocon
+++ b/rel/i18n/emqx_conf_schema.hocon
@@ -101,7 +101,7 @@ common_handler_flush_qlen.label:
 
 common_handler_chars_limit.desc:
 """Set the maximum length of a single log message. If this length is exceeded, the log message will be truncated.
-When formatter is 'json' the truncation is done on the JSON values, but not on the log message itself."""
+When formatter is <code>json</code> the truncation is done on the JSON values, but not on the log message itself."""
 
 common_handler_chars_limit.label:
 """Single Log Max Length"""
@@ -661,7 +661,7 @@ Can be one of:
   - <code>utc</code>: the UTC time offset
   - <code>+-[hh]:[mm]</code>: user specified time offset, such as "-02:00" or "+00:00"
 Defaults to: <code>system</code>.
-This config has no effect for when formatter is 'json' as the timestamp in JSON is milliseconds since epoch."""
+This config has no effect for when formatter is <code>json</code> as the timestamp in JSON is milliseconds since epoch."""
 
 common_handler_time_offset.label:
 """Time Offset"""