diff --git a/doc/api_manual_latest.html b/doc/api_manual_latest.html
new file mode 120000
index 000000000..46e4f4535
--- /dev/null
+++ b/doc/api_manual_latest.html
@@ -0,0 +1 @@
+api_manual_v1.5.7.html
\ No newline at end of file
diff --git a/index.html b/index.html
index c3c3e785f..0057deb13 100644
--- a/index.html
+++ b/index.html
@@ -62,7 +62,7 @@
         <!-- Collect the nav links, forms, and other content for toggling -->
         <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
           <ul class="nav navbar-nav navbar-nav">
-            <li><a href="doc/api_manual_v1.5.7.html">API documentation</a></li>
+            <li><a href="doc/api_manual_latest.html">API documentation</a></li>
             <li><a href="#other-languages">Languages</a></li>
             <li class="dropdown">
               <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">Index<span class="caret"></span></a>