diff --git a/web/src/reader/formats/reflowable/progress-tracker.ts b/web/src/reader/formats/reflowable/progress-tracker.ts
index af3dbf4..e39d05f 100644
--- a/web/src/reader/formats/reflowable/progress-tracker.ts
+++ b/web/src/reader/formats/reflowable/progress-tracker.ts
@@ -11,6 +11,7 @@ export function updateCurrentPosition(
   return {
     ...book,
     position,
+    currentSpineIndex: position.spineIndex,
   };
 }