diff --git a/tools/manual/index.html b/tools/manual/index.html
index 9c8f094189..472404094e 100644
--- a/tools/manual/index.html
+++ b/tools/manual/index.html
@@ -49,7 +49,8 @@ a:link, a:visited {
 </div>
 <select id="branch_selector" style="height:25px;margin:2px;">
   <option value="trunk">Development</option>
-  <option value="cp2k-2022_1-branch" selected>Version 2022.1</option>
+  <option value="cp2k-2023_1-branch" selected>Version 2023.1</option>
+  <option value="cp2k-2022_1-branch">Version 2022.1</option>
   <option value="cp2k-9_1-branch">Version 9.1</option>
   <option value="cp2k-8_2-branch">Version 8.2</option>
   <option value="cp2k-8_1-branch">Version 8.1</option>