diff --git a/config/database.yml.example b/config/database.yml.example
index 0a70489d..bb24c812 100644
--- a/config/database.yml.example
+++ b/config/database.yml.example
@@ -13,7 +13,7 @@ default: &default
     host: <%= ENV.fetch("MYSQL_HOST") { '127.0.0.1' } %>
     username: <%= ENV.fetch("MYSQL_USER") { 'root' } %>
     password: <%= ENV.fetch("MYSQL_PWD") { '123456' } %>
-    encoding: utf8
+    encoding: utf8mb4
 
 development:
   <<: *default