diff --git a/app/src/main/java/io/legado/app/help/CacheManager.kt b/app/src/main/java/io/legado/app/help/CacheManager.kt
index 547d3334a..bccbebcf2 100644
--- a/app/src/main/java/io/legado/app/help/CacheManager.kt
+++ b/app/src/main/java/io/legado/app/help/CacheManager.kt
@@ -41,7 +41,7 @@ object CacheManager {
         return get(key)?.toFloatOrNull()
     }
 
-    fun getByteArray(key: String) {
-        ACache.get(App.INSTANCE).getAsBinary(key)
+    fun getByteArray(key: String): ByteArray? {
+        return ACache.get(App.INSTANCE).getAsBinary(key)
     }
 }
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