diff --git a/kanken_online/templates/base.html b/kanken_online/templates/base.html
index 6a9ff0d..0221f58 100644
--- a/kanken_online/templates/base.html
+++ b/kanken_online/templates/base.html
@@ -2,6 +2,7 @@
 <html>
 
 <head>
+  <meta charset="UTF-8">
   <title>{% block title %}{% endblock %} ・ {{ localize("kanken_online") }}</title>
   <link rel="stylesheet" href="{{ url_for('static', filename='style.css') }}">
   {% if session %}
