diff --git a/src/events.ts b/src/events.ts
index 5a1e4c4..3783936 100644
--- a/src/events.ts
+++ b/src/events.ts
@@ -79,7 +79,7 @@ class AddonEvents extends AddonBase {
         message.content.editorInstance._item.id === mainKnowledgeID;
 
       Zotero.debug(`Knowledge4Zotero: main Knowledge`);
-      this._Addon.views.addEditorButton(
+      await this._Addon.views.addEditorButton(
         message.content.editorInstance,
         "workspace",
         isMainKnowledge ? "isMainKnowledge" : "notMainKnowledge",
@@ -89,7 +89,7 @@ class AddonEvents extends AddonBase {
         "start",
         new EditorMessage("openWorkspace", {})
       );
-      this._Addon.views.addEditorButton(
+      await this._Addon.views.addEditorButton(
         message.content.editorInstance,
         "addToKnowledge",
         "addToKnowledge",
@@ -99,7 +99,7 @@ class AddonEvents extends AddonBase {
           itemID: message.content.editorInstance._item.id,
         })
       );
-      this._Addon.views.addEditorButton(
+      await this._Addon.views.addEditorButton(
         message.content.editorInstance,
         "export",
         "export",
diff --git a/src/knowledge.ts b/src/knowledge.ts
index 3549673..2691e3d 100644
--- a/src/knowledge.ts
+++ b/src/knowledge.ts
@@ -443,8 +443,8 @@ class Knowledge extends AddonBase {
       item.setNote(`<div data-schema-version="8">${newLines.join("\n")}</div>`);
       item.saveTx();
       exporter.items = [item];
-      exporter.save();
-      Zotero.Items.erase(item.id);
+      await exporter.save();
+      await Zotero.Items.erase(item.id);
     } else {
       exporter.items = [note];
       exporter.save();
diff --git a/src/views.ts b/src/views.ts
index 0550c0a..dea284b 100644
--- a/src/views.ts
+++ b/src/views.ts
@@ -28,23 +28,26 @@ class AddonViews extends AddonBase {
   async addEditorKnowledgeToolBar(editorInstances: EditorInstance) {
     await editorInstances._initPromise;
 
-    const _document = editorInstances._iframeWindow.document;
-    const knowledgeToolBar = _document.createElement("div");
-    knowledgeToolBar.setAttribute("id", "knowledge-tools");
-    knowledgeToolBar.setAttribute("class", "toolbar");
-    const start = _document.createElement("div");
-    start.setAttribute("id", "knowledge-tools-start");
-    start.setAttribute("class", "start");
-    const middle = _document.createElement("div");
-    middle.setAttribute("id", "knowledge-tools-middle");
-    middle.setAttribute("class", "middle");
-    const end = _document.createElement("div");
-    end.setAttribute("id", "knowledge-tools-end");
-    end.setAttribute("class", "end");
-    knowledgeToolBar.append(start, middle, end);
-    _document
-      .getElementsByClassName("editor")[0]
-      .childNodes[0].before(knowledgeToolBar);
+    await new Promise<void>((resolve, reject) => {
+      const _document = editorInstances._iframeWindow.document;
+      const knowledgeToolBar = _document.createElement("div");
+      knowledgeToolBar.setAttribute("id", "knowledge-tools");
+      knowledgeToolBar.setAttribute("class", "toolbar");
+      const start = _document.createElement("div");
+      start.setAttribute("id", "knowledge-tools-start");
+      start.setAttribute("class", "start");
+      const middle = _document.createElement("div");
+      middle.setAttribute("id", "knowledge-tools-middle");
+      middle.setAttribute("class", "middle");
+      const end = _document.createElement("div");
+      end.setAttribute("id", "knowledge-tools-end");
+      end.setAttribute("class", "end");
+      knowledgeToolBar.append(start, middle, end);
+      _document
+        .getElementsByClassName("editor")[0]
+        .childNodes[0].before(knowledgeToolBar);
+      resolve();
+    });
   }
 
   async addEditorButton(
diff --git a/typing/global.d.ts b/typing/global.d.ts
index e4cdbbe..269666a 100644
--- a/typing/global.d.ts
+++ b/typing/global.d.ts
@@ -151,7 +151,7 @@ declare class ZoteroCollection {
 
 declare class Zotero_File_Exporter {
   items: ZoteroItem[];
-  save: () => void;
+  save = async () => {};
 }
 
 declare const Components: any;