diff --git a/src/doc/index.md b/src/doc/index.md
index 33ee76739c5b2c0ea7f0a55691fbcf7e3682971a..b79a349a453b6868502101a84ae92278ffc0b0c7 100644
--- a/src/doc/index.md
+++ b/src/doc/index.md
@@ -21,6 +21,9 @@ nav {
 #search-but:hover, #search-input:focus {
     border-color: #55a9ff;
 }
+h2 {
+    font-size: 18px;
+}
 </style>
 
 Welcome to an overview of the documentation provided by the Rust project.