diff --git a/docs/extensions/guides/README.md b/docs/extensions/guides/README.md
index cca497a95d..90368645f3 100644
--- a/docs/extensions/guides/README.md
+++ b/docs/extensions/guides/README.md
@@ -14,21 +14,20 @@ Each guide or code sample includes the following:
 
 ## Guides
 
-| Guide                                                              | APIs                   |
-| ------------------------------------------------------------------ | ---------------------- |
-| [Generate new extension project](generator.md)                     |                        |
-| [Main process extension](main-extension.md)                        | Main.LensExtension     |
-| [Renderer process extension](renderer-extension.md)                | Renderer.LensExtension |
-| [Resource stack (cluster feature)](resource-stack.md)              |                        |
-| [Extending KubernetesCluster)](extending-kubernetes-cluster.md)    |                        |
-| [Stores](stores.md)                                                |                        |
-| [Components](components.md)                                        |                        |
-| [KubeObjectListLayout](kube-object-list-layout.md)                 |                        |
-| [Working with mobx](working-with-mobx.md)                          |                        |
-| [Protocol Handlers](protocol-handlers.md)                          |                        |
-| [Sending Data between main and renderer](ipc.md)                   |                        |
-| [Catalog Entities and Categories](catalog.md)                      |                        |
-| [Adding Custom Columns for Categories](custom-category-columns.md) |                        |
+| Guide                                                           | APIs                   |
+| --------------------------------------------------------------- | ---------------------- |
+| [Generate new extension project](generator.md)                  |                        |
+| [Main process extension](main-extension.md)                     | Main.LensExtension     |
+| [Renderer process extension](renderer-extension.md)             | Renderer.LensExtension |
+| [Resource stack (cluster feature)](resource-stack.md)           |                        |
+| [Extending KubernetesCluster)](extending-kubernetes-cluster.md) |                        |
+| [Stores](stores.md)                                             |                        |
+| [Components](components.md)                                     |                        |
+| [KubeObjectListLayout](kube-object-list-layout.md)              |                        |
+| [Working with mobx](working-with-mobx.md)                       |                        |
+| [Protocol Handlers](protocol-handlers.md)                       |                        |
+| [Sending Data between main and renderer](ipc.md)                |                        |
+| [Catalog Entities and Categories](catalog.md)                   |                        |
 
 ## Samples
 
diff --git a/docs/extensions/guides/custom-category-columns.md b/docs/extensions/guides/custom-category-columns.md
deleted file mode 100644
index e69de29bb2..0000000000
diff --git a/src/renderer/components/markdown-viewer/markdown-viewer.tsx b/src/renderer/components/markdown-viewer/markdown-viewer.tsx
index c105d8411a..ca131c7cbb 100644
--- a/src/renderer/components/markdown-viewer/markdown-viewer.tsx
+++ b/src/renderer/components/markdown-viewer/markdown-viewer.tsx
@@ -8,7 +8,7 @@
 import "./markdown-viewer.scss";
 
 import React, { Component } from "react";
-import marked from "marked";
+import { marked } from "marked";
 import DOMPurify from "dompurify";
 import { cssNames } from "../../utils";