diff --git a/src/decrypt/kgm_wasm.ts b/src/decrypt/kgm_wasm.ts
index 039c3be..b2092cb 100644
--- a/src/decrypt/kgm_wasm.ts
+++ b/src/decrypt/kgm_wasm.ts
@@ -2,9 +2,6 @@ import { KgmCrypto } from '@xhacker/kgmwasm/KgmWasmBundle';
 import KgmCryptoModule from '@xhacker/kgmwasm/KgmWasmBundle';
 import { MergeUint8Array } from '@/utils/MergeUint8Array';
 
-// 每次处理 2M 的数据
-const DECRYPTION_BUF_SIZE = 2 *1024 * 1024;
-
 export interface KGMDecryptionResult {
   success: boolean;
   data: Uint8Array;
@@ -34,6 +31,9 @@ export async function DecryptKgmWasm(kgmBlob: ArrayBuffer, ext: string): Promise
     return result;
   }
 
+  // 每次处理 2M 的数据
+  const DECRYPTION_BUF_SIZE = Math.min(2 *1024 * 1024, kgmBlob.byteLength);
+
   // 申请内存块，并文件末端数据到 WASM 的内存堆
   let kgmBuf = new Uint8Array(kgmBlob);
   const pQmcBuf = KgmCryptoObj._malloc(DECRYPTION_BUF_SIZE);
@@ -41,7 +41,6 @@ export async function DecryptKgmWasm(kgmBlob: ArrayBuffer, ext: string): Promise
 
   // 进行解密初始化
   const headerSize = KgmCryptoObj.preDec(pQmcBuf, DECRYPTION_BUF_SIZE, ext);
-  console.log(headerSize);
   kgmBuf = kgmBuf.slice(headerSize);
 
   const decryptedParts = [];
diff --git a/src/decrypt/qmc_wasm.ts b/src/decrypt/qmc_wasm.ts
index f747bf4..7789409 100644
--- a/src/decrypt/qmc_wasm.ts
+++ b/src/decrypt/qmc_wasm.ts
@@ -2,9 +2,6 @@ import { QmcCrypto } from '@xhacker/qmcwasm/QmcWasmBundle';
 import QmcCryptoModule from '@xhacker/qmcwasm/QmcWasmBundle';
 import { MergeUint8Array } from '@/utils/MergeUint8Array';
 
-// 每次处理 2M 的数据
-const DECRYPTION_BUF_SIZE = 2 *1024 * 1024;
-
 export interface QMCDecryptionResult {
   success: boolean;
   data: Uint8Array;
@@ -35,6 +32,9 @@ export async function DecryptQmcWasm(qmcBlob: ArrayBuffer, ext: string): Promise
     return result;
   }
 
+  // 每次处理 2M 的数据
+  const DECRYPTION_BUF_SIZE = Math.min(2 *1024 * 1024, qmcBlob.byteLength);
+
   // 申请内存块，并文件末端数据到 WASM 的内存堆
   const qmcBuf = new Uint8Array(qmcBlob);
   const pQmcBuf = QmcCryptoObj._malloc(DECRYPTION_BUF_SIZE);