diff --git a/app/src/main/java/io/legado/app/service/HttpReadAloudService.kt b/app/src/main/java/io/legado/app/service/HttpReadAloudService.kt
index 3b2dbd588..358216bc6 100644
--- a/app/src/main/java/io/legado/app/service/HttpReadAloudService.kt
+++ b/app/src/main/java/io/legado/app/service/HttpReadAloudService.kt
@@ -35,7 +35,7 @@ class HttpReadAloudService : BaseReadAloudService(),
 
     private val mediaPlayer = MediaPlayer()
     private val ttsFolderPath: String by lazy {
-        externalCacheDir!!.absolutePath + File.separator + "httpTTS" + File.separator
+        cacheDir.absolutePath + File.separator + "httpTTS" + File.separator
     }
     private val cacheFiles = hashSetOf<String>()
     private var task: Coroutine<*>? = null
@@ -261,6 +261,9 @@ class HttpReadAloudService : BaseReadAloudService(),
     private fun createSpeakFileAsMd5IfNotExist(name: String): File =
         FileUtils.createFileIfNotExist("${ttsFolderPath}$name.mp3")
 
+    /**
+     * 移除缓存文件
+     */
     private fun removeCacheFile() {
         val cacheRegex = Regex(""".+\.mp3$""")
         val reg = """^${MD5Utils.md5Encode16(textChapter!!.title)}_[a-z0-9]{16}\.mp3$""".toRegex()
@@ -270,7 +273,7 @@ class HttpReadAloudService : BaseReadAloudService(),
                     FileUtils.deleteFile(it.absolutePath)
                 }
             } else {
-                if (Date().time - it.lastModified() > 30000) {
+                if (Date().time - it.lastModified() > 600000) {
                     FileUtils.deleteFile(it.absolutePath)
                 }
             }