diff --git a/index.html b/index.html
index 1fedbd6..434bb42 100644
--- a/index.html
+++ b/index.html
@@ -33,7 +33,7 @@
                 </a>
             </li>
             <li>
-                <a href="library.kovachev.xyz">
+                <a href="https://library.kovachev.xyz">
                     <img src="static/calibre.png" alt="Calibre logo" title="Visit my library"  width="48" height="48">
                 </a>
             </li>