diff --git a/scripts/upgrade b/scripts/upgrade
index e2a14e0..a4c5d35 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -309,6 +309,10 @@ chown $app:$app "$final_path/settings.json"
 chmod 600 "$final_path/credentials.json"
 chown $app:$app "$final_path/credentials.json"
 
+# Support full Unicode in MySQL databases
+ynh_mysql_connect_as --user=$db_user --password="$db_pwd" --database=$db_name \
+    <<< "ALTER DATABASE $db_name CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;"
+
 #=================================================
 # SETUP SYSTEMD
 #=================================================