diff --git a/docusaurus.config.js b/docusaurus.config.js
index 20848bf379b..5f85ffca172 100644
--- a/docusaurus.config.js
+++ b/docusaurus.config.js
@@ -171,6 +171,13 @@ const config = {
             docsPluginId: 'contracts',
             dropdownActiveClassDisabled: true
           },
+          {
+            type: 'docsVersionDropdown',
+            position: 'right',
+            dropdownItemsAfter: [{ to: '/ontology/schemas', label: 'Latest version' }],
+            docsPluginId: 'ontology',
+            dropdownActiveClassDisabled: true
+          },
           {
             type: 'docsVersionDropdown',
             position: 'right',
@@ -331,6 +338,14 @@ const config = {
         routeBasePath: 'contracts/'
       }
     ],
+    [
+      '@docusaurus/plugin-content-docs',
+      {
+        id: 'ontology',
+        path: 'ontology',
+        routeBasePath: 'ontology/'
+      }
+    ],
     [
       '@docusaurus/plugin-content-docs',
       {
diff --git a/sidebars.js b/sidebars.js
index 1aae2327bd1..0867318cfd4 100644
--- a/sidebars.js
+++ b/sidebars.js
@@ -35,7 +35,7 @@ const sidebars = {
       items: [
         {
           type: 'doc',
-          id: 'technical-documentation/overview',
+          id: 'technical-documentation/overview'
         },
         {
           type: 'category',
@@ -59,24 +59,33 @@ const sidebars = {
         },
         {
           type: 'link',
-          label: "Smart contracts",
-          href: '/contracts',
+          label: 'Smart contracts',
+          href: '/contracts'
+        },
+        {
+          type: 'html',
+          value: '<hr/>'
         },
         {
           type: 'link',
-          label: 'Governance Predicates',
-          href: '/predicates/predicates',
+          label: 'Ontology',
+          href: '/ontology/schemas'
         },
         {
           type: 'link',
-          label: "Modules",
-          href: '/modules/logic',
+          label: 'Governance Predicates',
+          href: '/predicates/predicates'
         },
         {
           type: 'link',
-          label: "Commands line interface",
-          href: '/commands/okp4d',
+          label: 'Modules',
+          href: '/modules/logic'
         },
+        {
+          type: 'link',
+          label: 'Commands line interface',
+          href: '/commands/okp4d'
+        }
       ]
     }
   ],
@@ -98,7 +107,7 @@ const sidebars = {
       id: 'faq/faq',
       label: 'FAQ'
     }
-  ],
+  ]
 }
 
 module.exports = sidebars