diff --git a/src/lib/reoff-cite.ts b/src/lib/reoff-cite.ts
index cc0e6a4..1ca0aed 100755
--- a/src/lib/reoff-cite.ts
+++ b/src/lib/reoff-cite.ts
@@ -2,14 +2,11 @@ import { Root } from 'ooxast'
 import { VFile } from 'vfile'
 import { Data as CSL } from 'csl-json'
 import { findCitations, Options } from 'ooxast-util-citations'
+import { Plugin } from 'unified'
 
-// export interface ReoffCiteOptions {
-//   bibliography?: CSL[]
-//   type: 'mendeley' | 'word' | 'citavi' | 'zotero' | 'endnote'
-//   log?: boolean
-// }
-
-export default function reoffCite(options: Options = { type: 'zotero' }) {
+export default function reoffCite(
+  options: Options = { type: 'zotero' },
+): ReturnType<Plugin<[Options | void | undefined], Root, Root>> {
   return (tree: Root, vfile: VFile) => {
     if (options.log !== false) {
       console.log(vfile.data.bibliography)