diff --git a/pages/error-page-404.xml b/pages/error-page-404.xml
index 76bde4c1..83fb9921 100644
--- a/pages/error-page-404.xml
+++ b/pages/error-page-404.xml
@@ -2,7 +2,7 @@
 <div data-template="templates:surround" data-template-at="content"
     data-template-with="templates/site.xml">
     <div>
-        <h1>Page Not found</h1>
+        <h1>Page not found</h1>
         <p>The resource you requested could not be found.</p>
     </div>
 </div>
diff --git a/pages/error-page.xml b/pages/error-page.xml
index b5114544..a17fba8c 100644
--- a/pages/error-page.xml
+++ b/pages/error-page.xml
@@ -7,7 +7,7 @@
         <pre class="error templates:error-description"/>
     </div>
     <div data-template="app:handle-error" data-template-code="404">
-        <h1>Page Not found</h1>
+        <h1>Page not found</h1>
         <p>The resource you requested could not be found.</p>
     </div>
 </div>