diff --git a/src/theme/index.hbs b/src/theme/index.hbs
index b205670f..8b362342 100644
--- a/src/theme/index.hbs
+++ b/src/theme/index.hbs
@@ -183,13 +183,13 @@
 
             <nav class="nav-wide-wrapper" aria-label="Page navigation">
                 {{#previous}}
-                    <a href="{{ path_to_root }}{{link}}" class="nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left">
+                    <a rel="prev" href="{{ path_to_root }}{{link}}" class="nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left">
                         <i class="fa fa-angle-left"></i>
                     </a>
                 {{/previous}}
 
                 {{#next}}
-                    <a href="{{ path_to_root }}{{link}}" class="nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right">
+                    <a rel="next" href="{{ path_to_root }}{{link}}" class="nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right">
                         <i class="fa fa-angle-right"></i>
                     </a>
                 {{/next}}