diff --git a/app/db.sqlite3 b/app/db.sqlite3
index e39e3de3..0f009ceb 100644
Binary files a/app/db.sqlite3 and b/app/db.sqlite3 differ
diff --git a/app/server/static/css/annotation.css b/app/server/static/css/annotation.css
index 0733af08..fad985fb 100644
--- a/app/server/static/css/annotation.css
+++ b/app/server/static/css/annotation.css
@@ -1,8 +1,8 @@
 html,
 body {
-  font-family: arial, 'Open Sans', serif;
-  line-height: 1.5;
-  height: 100%;
+  /*font-family: arial, 'Open Sans', serif;*/
+  /*line-height: 1.5;
+  height: 100%;*/
   background-color: #f3f3f3;
 }
 
diff --git a/app/server/static/css/forum.css b/app/server/static/css/forum.css
index 2fd1109e..16c827f2 100644
--- a/app/server/static/css/forum.css
+++ b/app/server/static/css/forum.css
@@ -1,6 +1,7 @@
 html,
 body {
-  font-family: 'Open Sans', serif;
+  /*font-family: 'Open Sans', serif;*/
+  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", YuGothic, "ヒラギノ角ゴ ProN W3", Hiragino Kaku Gothic ProN, Arial, "メイリオ", Meiryo, sans-serif;
   background: #F9F9F9;
 }