diff --git a/src/generators/html.cpp b/src/generators/html.cpp
index cf38664..9312eee 100644
--- a/src/generators/html.cpp
+++ b/src/generators/html.cpp
@@ -51,6 +51,10 @@ void write_html(ostream &out, const vector<entry_type> &entries)
     <meta charset="utf-8">
     <meta name="robots" content="noindex, nofollow">
     <style>
+      body
+      {
+        max-width: 100ch;
+      }
       .small
       {
         font-size: small;