diff --git a/docs/1.4/api/authentication/index.html b/docs/1.4/api/authentication/index.html
index 04dd39c..a2fd392 100644
--- a/docs/1.4/api/authentication/index.html
+++ b/docs/1.4/api/authentication/index.html
@@ -21,19 +21,19 @@
     <title>Authentication API Specification :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1608128209" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1608128209" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1608128209" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1608128209" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1608128209" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1608128209" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1608128209" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1608128209" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1608171132" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1608171132" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1608171132" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1608171132" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1608171132" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1608171132" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1608171132" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1608171132" rel="stylesheet">
     
-      <link href="/hono/docs/css/theme-hono.css?1608128209" rel="stylesheet">
+      <link href="/hono/docs/css/theme-hono.css?1608171132" rel="stylesheet">
     
 
-    <script src="/hono/docs/js/jquery-2.x.min.js?1608128209"></script>
+    <script src="/hono/docs/js/jquery-2.x.min.js?1608171132"></script>
 
     <style type="text/css">
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1608128209"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1608128209"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1608171132"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1608171132"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1608128209"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1608171132"></script>
 
     
   </div>
@@ -1340,7 +1340,33 @@
                   
                     
                     
-                      <option id="stable" value="/hono/docs/api/authentication/">stable (1.4)</option>
+                      <option id="stable" value="/hono/docs/api/authentication/">stable (1.5)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.5" value="/hono/docs/1.5/api/authentication/">1.5</option>
                     
                   
               
@@ -1362,6 +1388,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="/hono/docs/1.4/api/authentication/" selected>1.4</option>
@@ -1386,6 +1414,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="/hono/docs/1.3/api/authentication/">1.3</option>
@@ -1410,6 +1440,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="/hono/docs/1.2/api/authentication/">1.2</option>
@@ -1434,6 +1466,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="/hono/docs/1.1/api/authentication/">1.1</option>
@@ -1458,6 +1492,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="/hono/docs/1.0/api/authentication/">1.0</option>
@@ -1482,6 +1518,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="/hono/docs/dev/api/authentication/">dev</option>
@@ -1539,6 +1577,12 @@
         <div id="overlay"></div>
         
         
+    <div class="old-version-hint">
+        <p>This page refers to version <em>1.4</em>.
+            You might want to use the <a href="https://www.eclipse.org/hono/docs/">current stable</a> version.
+        </p>
+    </div>
+
 
     
         <div class="padding highlightable">
@@ -2779,20 +2823,20 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1608128209"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1608128209"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1608128209"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1608128209"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1608128209"></script>
-    <script src="/hono/docs/js/html5shiv-printshiv.min.js?1608128209"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1608128209"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1608171133"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1608171133"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1608171133"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1608171133"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1608171133"></script>
+    <script src="/hono/docs/js/html5shiv-printshiv.min.js?1608171133"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1608171133"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom.71422.js?1608128209"></script>
-    <script src="/hono/docs/js/learn.js?1608128209"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1608128209"></script>
+    <script src="/hono/docs/js/modernizr.custom.71422.js?1608171133"></script>
+    <script src="/hono/docs/js/learn.js?1608171133"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1608171133"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1608128209" type="text/css" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1608128209"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1608171133" type="text/css" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1608171133"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>