diff --git a/static/css/theme.css b/static/css/theme.css
index ee6cb84..f181ef4 100644
--- a/static/css/theme.css
+++ b/static/css/theme.css
@@ -290,6 +290,7 @@ article .highlight pre {
 @media screen and (orientation:portrait) {
     article {
         max-width: 90vw;
+        font-size:16px;
     }
 }