diff --git a/common/src/commonMain/kotlin/tk/zwander/common/tools/CryptUtils.kt b/common/src/commonMain/kotlin/tk/zwander/common/tools/CryptUtils.kt
index 943ec3c09..748d4af6b 100644
--- a/common/src/commonMain/kotlin/tk/zwander/common/tools/CryptUtils.kt
+++ b/common/src/commonMain/kotlin/tk/zwander/common/tools/CryptUtils.kt
@@ -200,19 +200,19 @@ object CryptUtils {
         enc: Source?,
         encSize: Long,
         expected: Long,
-        progressCallback: suspend (current: Long, max: Long, bps: Long) -> Unit
+        progressCallback: suspend (current: Long, max: Long, bps: Long) -> Unit,
     ): Boolean {
         if (enc == null) {
             return false
         }
 
+        val buffer = ByteArray(DEFAULT_CHUNK_SIZE)
         var crcVal = CRC32.initialValue
 
         trackOperationProgress(
             size = encSize,
             progressCallback = progressCallback,
             operation = {
-                val buffer = ByteArray(DEFAULT_CHUNK_SIZE)
                 val len = enc.readAtMostTo(buffer, 0, buffer.size)
 
                 if (len > 0) {
diff --git a/common/src/commonMain/kotlin/tk/zwander/common/tools/delegates/Downloader.kt b/common/src/commonMain/kotlin/tk/zwander/common/tools/delegates/Downloader.kt
index 8a59ea659..e4eca4fe5 100644
--- a/common/src/commonMain/kotlin/tk/zwander/common/tools/delegates/Downloader.kt
+++ b/common/src/commonMain/kotlin/tk/zwander/common/tools/delegates/Downloader.kt
@@ -154,7 +154,7 @@ object Downloader {
                     model.statusText.value = MR.strings.checkingCRC()
                     val result = CryptUtils.checkCrc32(
                         encFile.openInputStream() ?: return,
-                        size,
+                        encFile.getLength(),
                         crc32,
                     ) { current, max, bps ->
                         model.progress.value = current to max
@@ -164,7 +164,7 @@ object Downloader {
                             Event.Download.Progress(
                                 MR.strings.checkingCRC(),
                                 current,
-                                max
+                                max,
                             )
                         )
                     }
diff --git a/common/src/commonMain/kotlin/tk/zwander/common/util/Averager.kt b/common/src/commonMain/kotlin/tk/zwander/common/util/Averager.kt
index 066c486de..dcaa39611 100644
--- a/common/src/commonMain/kotlin/tk/zwander/common/util/Averager.kt
+++ b/common/src/commonMain/kotlin/tk/zwander/common/util/Averager.kt
@@ -21,6 +21,12 @@ class Averager(initialCapacity: Int = 1000, private val thresholdNanos: Long = 1
         }
     }
 
+    suspend fun close() {
+        mutex.withLock {
+            chunk.clear()
+        }
+    }
+
     private fun unsafeUpdate(durationNano: Long, read: Long) {
         val currentTimeNano = currentTimeNano()
         chunk.add(ChunkData(durationNano, read, currentTimeNano))
diff --git a/common/src/commonMain/kotlin/tk/zwander/common/util/ProgressUtils.kt b/common/src/commonMain/kotlin/tk/zwander/common/util/ProgressUtils.kt
index 99f66b443..cb50d81df 100644
--- a/common/src/commonMain/kotlin/tk/zwander/common/util/ProgressUtils.kt
+++ b/common/src/commonMain/kotlin/tk/zwander/common/util/ProgressUtils.kt
@@ -117,5 +117,6 @@ suspend fun trackOperationProgress(
         }
 
         finished.value = true
+        averager.close()
     }
 }