diff --git a/README.md b/README.md
index a6b73d5..5b265f6 100644
--- a/README.md
+++ b/README.md
@@ -7,5 +7,16 @@
 
 alpha state
 
+## update
+
+# to 0.11a
+
+Update mariadDB from `10.2` to `10.3`:
+
+```
+docker-compose exec wordpress-database sh -c 'mysql_upgrade -uroot -p${MYSQL_ROOT_PASSWORD}'
+```
+
+
 ## info
 - https://hub.docker.com/_/wordpress/