diff --git a/quartz/plugins/emitters/contentIndex.ts b/quartz/plugins/emitters/contentIndex.ts
index 4d4b72f8e..81e91542a 100644
--- a/quartz/plugins/emitters/contentIndex.ts
+++ b/quartz/plugins/emitters/contentIndex.ts
@@ -94,7 +94,7 @@ function generateRSSFeed(cfg: GlobalConfiguration, idx: ContentIndex, limit?: nu
   </rss>`
 }
 
-export const ContentIndex: QuartzEmitterPlugin<Options> = (opts) => {
+export const ContentIndex: QuartzEmitterPlugin<Partial<Options>> = (opts) => {
   opts = { ...defaultOptions, ...opts }
   return {
     name: "ContentIndex",