diff --git a/lib/prefetcher.js b/lib/prefetcher.js
index a89bbab..4b2f7ce 100644
--- a/lib/prefetcher.js
+++ b/lib/prefetcher.js
@@ -43,6 +43,8 @@ module.exports = class Prefetcher {
       this.missing++
     }
 
+    if (end >= this.endBound) end = this.endBound
+
     this.start = start
     this.end = end
     this.range = this.core.download({