diff --git a/README.md b/README.md
index 663a764..ce0f8a1 100644
--- a/README.md
+++ b/README.md
@@ -280,7 +280,7 @@ conf.probe.httperrorlog.file=/var/log/apache2/foo.bar.org-error.log*,/var/log/ap
 conf.probe.target=/srv/statoolinfos/well-known/statoolinfos/foo.bar.org-metrics.properties
 
 # Custom access log pattern with Java regex.
-# Default: ^(?<remoteAddress>[a-fA-F0-9\:\.]+) - (?<remoteUser>[^\[]+) \[(?<time>[^\]]+)\] "(?<request>.*)" (?<status>\d+) (?<bodyBytesSent>\d+) "(?<referer>.*)" "(?<userAgent>[^"]*)".*$ 
+# Default: ^(?<remoteAddress>[a-fA-F0-9\:\.]+) - (?<remoteUser>[^\[]+) \[(?<time>[^\]]+)\] "(?<request>([^\"]|\")*)" (?<status>\d+) (?<bodyBytesSent>\d+) "(?<referer>([^\"]|\")*)" "(?<userAgent>([^\"]|\")*)".*$
 conf.probe.httpaccesslog.pattern=
 
 # Custom datetime access log pattern (https://docs.oracle.com/javase/8/docs/api/java/time/format/DateTimeFormatter.html#patterns).
@@ -290,6 +290,15 @@ conf.prob.httpaccesslog.datetimepattern=
 # Filter request with Java regex (without the initial '^' and without the final '$', see https://docs.oracle.com/javase/8/docs/api/java/util/regex/Pattern.html).
 # Example: pathfilter=/.*well-known.*
 conf.probe.httpaccesslog.pathfilter=
+
+# Custom error log pattern with Java regex.
+# Default Apache: ^\[(?<time>[^\]]+)\]\s\[(?<level>[^\]]*)\]\s(?<message>.*)$
+# Default NGinx:  ^(?<time>\S+\s\S+)\s\[(?<level>[^\]]*)\]\s(?<message>.*)$
+conf.probe.httperrorlog.pattern=
+
+# Custom datetime access log pattern (https://docs.oracle.com/javase/8/docs/api/java/time/format/DateTimeFormatter.html#patterns).
+# Default: dd/MMM/yyyy:HH:mm:ss Z|EN
+conf.prob.httperrorlog.datetimepattern=
 ```
 
 Warning: to have month metric values, you have to set **retention log to 7 weeks or 50 days** in Nginx or Apache logrotate configuration.