diff --git a/package-lock.json b/package-lock.json
index e618e0a..b9f989c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -35,7 +35,7 @@
         "unist-util-visit": "^5.0.0",
         "unist-util-visit-parents": "^6.0.1",
         "yamljs": "^0.3.0",
-        "zotero-plugin-toolkit": "^4.0.7"
+        "zotero-plugin-toolkit": "^4.0.8"
       },
       "devDependencies": {
         "@esbuild-plugins/node-globals-polyfill": "^0.2.3",
@@ -13588,9 +13588,9 @@
       }
     },
     "node_modules/zotero-plugin-toolkit": {
-      "version": "4.0.7",
-      "resolved": "https://registry.npmjs.org/zotero-plugin-toolkit/-/zotero-plugin-toolkit-4.0.7.tgz",
-      "integrity": "sha512-9bAXXJTgH5SkyauGft50EerudZYGYzN/T3kPgi7udB8lScVyO+HkYERxJqnFuvk2gHzV+stqeaKaX9a0ODTxEQ==",
+      "version": "4.0.8",
+      "resolved": "https://registry.npmjs.org/zotero-plugin-toolkit/-/zotero-plugin-toolkit-4.0.8.tgz",
+      "integrity": "sha512-uro188jzhAY+6EB2N9Kx0Vn5ITazwljJOragMi7PjrcRQrEi/R350eT+MAFrDR+pMzEOltrKtz6W7aSvMd9iqA==",
       "dependencies": {
         "zotero-types": "^2.2.0"
       },
diff --git a/package.json b/package.json
index e2c0cd7..d1286c9 100644
--- a/package.json
+++ b/package.json
@@ -56,7 +56,7 @@
     "unist-util-visit": "^5.0.0",
     "unist-util-visit-parents": "^6.0.1",
     "yamljs": "^0.3.0",
-    "zotero-plugin-toolkit": "^4.0.7"
+    "zotero-plugin-toolkit": "^4.0.8"
   },
   "devDependencies": {
     "@esbuild-plugins/node-globals-polyfill": "^0.2.3",
diff --git a/src/extras/parsingWorker.ts b/src/extras/parsingWorker.ts
index 3b5cd5e..d3857cf 100644
--- a/src/extras/parsingWorker.ts
+++ b/src/extras/parsingWorker.ts
@@ -97,12 +97,10 @@ function parseHTMLLines(html: string): string[] {
   return parsedLines;
 }
 
-const funcs = {
+const handlers = {
   parseHTMLLines,
 };
 
-const handlers = MessageHelper.wrapHandlers(funcs);
-
 const messageServer = new MessageHelper({
   canBeDestroyed: true,
   dev: true,
diff --git a/src/extras/relationWorker.ts b/src/extras/relationWorker.ts
index 1325ec5..e87adf5 100644
--- a/src/extras/relationWorker.ts
+++ b/src/extras/relationWorker.ts
@@ -15,7 +15,7 @@ db.version(2).stores({
 
 log("Using Dexie v" + Dexie.semVer, db);
 
-const funcs = {
+const handlers = {
   addLink,
   bulkAddLink,
   rebuildLinkForNote,
@@ -26,8 +26,6 @@ const funcs = {
   getAnnotationByLinkTarget,
 };
 
-const handlers = MessageHelper.wrapHandlers(funcs);
-
 const messageServer = new MessageHelper({
   canBeDestroyed: true,
   dev: true,
diff --git a/src/utils/note.ts b/src/utils/note.ts
index 4e3b54b..bf64596 100644
--- a/src/utils/note.ts
+++ b/src/utils/note.ts
@@ -20,7 +20,7 @@ export {
 
 async function parseHTMLLines(html: string) {
   const server = await getParsingServer();
-  return await server.exec("parseHTMLLines", [html]);
+  return await server.proxy.parseHTMLLines(html);
 }
 
 async function getLinesInNote(
@@ -58,8 +58,7 @@ async function setLinesToNote(note: Zotero.Item, lines: string[]) {
   } else {
     const noteHead = noteText.substring(0, containerIndex);
     note.setNote(
-      `${noteHead}data-schema-version="${
-        config.dataSchemaVersion
+      `${noteHead}data-schema-version="${config.dataSchemaVersion
       }">${lines.join("\n")}</div>`,
     );
   }
diff --git a/src/utils/parsing.ts b/src/utils/parsing.ts
index 1e77289..fd194e7 100644
--- a/src/utils/parsing.ts
+++ b/src/utils/parsing.ts
@@ -25,7 +25,7 @@ async function getParsingServer() {
     handlers: {},
   });
   server.start();
-  await server.exec("_ping");
+  await server.proxy._ping();
   addon.data.parsing.server = server;
   return server;
 }
diff --git a/src/utils/relation.ts b/src/utils/relation.ts
index 0c4505b..98369d5 100644
--- a/src/utils/relation.ts
+++ b/src/utils/relation.ts
@@ -73,9 +73,7 @@ async function updateNoteLinkRelation(noteID: number) {
       }
     }
   }
-  const result = await (
-    await getRelationServer()
-  ).exec("rebuildLinkForNote", [fromLibID, fromKey, linkToData]);
+  const result = await (await getRelationServer()).proxy.rebuildLinkForNote(fromLibID, fromKey, linkToData);
 
   for (const link of result.oldOutboundLinks as LinkModel[]) {
     const item = Zotero.Items.getByLibraryAndKey(link.toLibID, link.toKey);
@@ -98,17 +96,14 @@ async function getNoteLinkOutboundRelation(noteID: number) {
   const note = Zotero.Items.get(noteID);
   const fromLibID = note.libraryID;
   const fromKey = note.key;
-  return (await getRelationServer()).exec("getOutboundLinks", [
-    fromLibID,
-    fromKey,
-  ]);
+  return await (await getRelationServer()).proxy.getOutboundLinks(fromLibID, fromKey);
 }
 
 async function getNoteLinkInboundRelation(noteID: number) {
   const note = Zotero.Items.get(noteID);
   const toLibID = note.libraryID;
   const toKey = note.key;
-  return (await getRelationServer()).exec("getInboundLinks", [toLibID, toKey]);
+  return await (await getRelationServer()).proxy.getInboundLinks(toLibID, toKey);
 }
 
 function decodeHTMLEntities(text: string) {
@@ -130,21 +125,15 @@ interface LinkModel {
 }
 
 async function linkAnnotationToTarget(model: AnnotationModel) {
-  return (await getRelationServer()).exec("linkAnnotationToTarget", [model]);
+  return await (await getRelationServer()).proxy.linkAnnotationToTarget(model);
 }
 
 async function getLinkTargetByAnnotation(fromLibID: number, fromKey: string) {
-  return (await getRelationServer()).exec("getLinkTargetByAnnotation", [
-    fromLibID,
-    fromKey,
-  ]);
+  return await (await getRelationServer()).proxy.getLinkTargetByAnnotation(fromLibID, fromKey);
 }
 
 async function getAnnotationByLinkTarget(toLibID: number, toKey: string) {
-  return (await getRelationServer()).exec("getAnnotationByLinkTarget", [
-    toLibID,
-    toKey,
-  ]);
+  return await (await getRelationServer()).proxy.getAnnotationByLinkTarget(toLibID, toKey);
 }
 
 interface AnnotationModel {