diff --git a/src/decrypt-worker/decipher/Ximalaya.ts b/src/decrypt-worker/decipher/Ximalaya.ts
index fae3734..17edc4c 100644
--- a/src/decrypt-worker/decipher/Ximalaya.ts
+++ b/src/decrypt-worker/decipher/Ximalaya.ts
@@ -52,6 +52,7 @@ export class XimalayaPCDecipher implements DecipherInstance {
     const encryptedAudioPart = buffer.slice(encryptedHeaderOffset, plainAudioDataOffset);
     const encryptedAudioPartLen = xm.decrypt(encryptedAudioPart);
     const audioSize = audioHeader.byteLength + encryptedAudioPartLen + plainAudioDataLength;
+    xm.free();
 
     const result = new Uint8Array(audioSize);
     result.set(audioHeader);