diff --git a/app/editor/components/Styles.ts b/app/editor/components/Styles.ts
index c29781375..9b0c18137 100644
--- a/app/editor/components/Styles.ts
+++ b/app/editor/components/Styles.ts
@@ -728,8 +728,11 @@ const EditorStyles = styled.div<{
   }
 
   .external-link {
+    display: inline-block;
     position: relative;
     top: 2px;
+    width: 16px;
+    height: 16px;
   }
 
   .code-actions,
diff --git a/shared/editor/marks/Link.tsx b/shared/editor/marks/Link.tsx
index 76e35723e..5548287d7 100644
--- a/shared/editor/marks/Link.tsx
+++ b/shared/editor/marks/Link.tsx
@@ -13,12 +13,20 @@ import { EditorState, Plugin } from "prosemirror-state";
 import { Decoration, DecorationSet } from "prosemirror-view";
 import * as React from "react";
 import ReactDOM from "react-dom";
-import { isInternalUrl } from "../../utils/urls";
+import { isExternalUrl } from "../../utils/urls";
 import findLinkNodes from "../queries/findLinkNodes";
 import { EventType, Dispatch } from "../types";
 import Mark from "./Mark";
 
 const LINK_INPUT_REGEX = /\[([^[]+)]\((\S+)\)$/;
+let icon: HTMLSpanElement;
+
+if (typeof window !== "undefined") {
+  const component = <OpenIcon color="currentColor" size={16} />;
+  icon = document.createElement("span");
+  icon.className = "external-link";
+  ReactDOM.render(component, icon);
+}
 
 function isPlainURL(
   link: ProsemirrorMark,
@@ -116,20 +124,15 @@ export default class Link extends Mark {
   }
 
   get plugins() {
-    const component = <OpenIcon color="currentColor" size={16} />;
-    const icon = document.createElement("span");
-    icon.className = "external-link";
-    ReactDOM.render(component, icon);
-
-    const getLinkDecorations = (doc: Node) => {
+    const getLinkDecorations = (state: EditorState) => {
       const decorations: Decoration[] = [];
-      const links = findLinkNodes(doc);
+      const links = findLinkNodes(state.doc);
 
       links.forEach((nodeWithPos) => {
         const linkMark = nodeWithPos.node.marks.find(
           (mark) => mark.type.name === "link"
         );
-        if (linkMark && !isInternalUrl(linkMark.attrs.href)) {
+        if (linkMark && isExternalUrl(linkMark.attrs.href)) {
           decorations.push(
             Decoration.widget(
               // place the decoration at the end of the link
@@ -145,16 +148,16 @@ export default class Link extends Mark {
         }
       });
 
-      return DecorationSet.create(doc, decorations);
+      return DecorationSet.create(state.doc, decorations);
     };
 
     const plugin: Plugin = new Plugin({
       state: {
         init: (config, state) => {
-          return getLinkDecorations(state.doc);
+          return getLinkDecorations(state);
         },
-        apply: (tr, oldState) => {
-          return tr.docChanged ? getLinkDecorations(tr.doc) : oldState;
+        apply: (tr, decorationSet, _oldState, newState) => {
+          return tr.docChanged ? getLinkDecorations(newState) : decorationSet;
         },
       },
       props: {
diff --git a/shared/utils/urls.ts b/shared/utils/urls.ts
index 94077f409..a4d30c85b 100644
--- a/shared/utils/urls.ts
+++ b/shared/utils/urls.ts
@@ -28,3 +28,7 @@ export function isInternalUrl(href: string) {
 
   return false;
 }
+
+export function isExternalUrl(href: string) {
+  return !isInternalUrl(href);
+}