diff --git a/src/site/_includes/components/pageheader.njk b/src/site/_includes/components/pageheader.njk
index 60436dde3..312d64236 100644
--- a/src/site/_includes/components/pageheader.njk
+++ b/src/site/_includes/components/pageheader.njk
@@ -1,3 +1,4 @@
+<meta http-equiv="content-type" content="text/html;charset=utf-8">
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <script async type="module">
     import mermaid from 'https://cdn.jsdelivr.net/npm/mermaid@10/dist/mermaid.esm.min.mjs';