diff --git a/index.php b/index.php
index 8da9896..4b424ae 100644
--- a/index.php
+++ b/index.php
@@ -13,7 +13,7 @@
     <link rel="icon" type="image/png" sizes="16x16" href="img/fi/favicon-16x16.png">
     <link rel="manifest" href="img/fi/site.webmanifest">
     <link rel="mask-icon" href="img/fi/safari-pinned-tab.svg" color="#5bbad5">
-    <link rel="canonical" href="http://<?=$_SERVER['SERVER_NAME']?>/index.php"/>
+    <link rel="canonical" href="https://<?=$_SERVER['SERVER_NAME']?>/index.php"/>
     <meta name="msapplication-TileColor" content="#2b5797">
     <meta name="theme-color" content="#ffffff">
     <meta charset="UTF-8">