diff --git a/sphinx/themes/basic/layout.html b/sphinx/themes/basic/layout.html
index f5961e389b..d10f183e1c 100644
--- a/sphinx/themes/basic/layout.html
+++ b/sphinx/themes/basic/layout.html
@@ -132,7 +132,7 @@
     {{- script() }}
     {%- endblock %}
     {%- if pageurl %}
-    <link rel="canonical" href="{{ pageurl }}" />
+    <link rel="canonical" href="{{ pageurl|e }}" />
     {%- endif %}
     {%- if use_opensearch %}
     <link rel="search" type="application/opensearchdescription+xml"