diff --git a/package-lock.json b/package-lock.json
index ec26807e..125b1644 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -448,8 +448,8 @@
       "dev": true
     },
     "asmcrypto.js": {
-      "version": "github:openpgpjs/asmcrypto#475cffa5ccb2cf2556427056679414acf3610d1b",
-      "from": "github:openpgpjs/asmcrypto#475cffa5ccb2cf2556427056679414acf3610d1b",
+      "version": "github:openpgpjs/asmcrypto#5b994303a9d3e27e0915f72a10b6c2c51535a4dc",
+      "from": "github:openpgpjs/asmcrypto#5b994303a9d3e27e0915f72a10b6c2c51535a4dc",
       "dev": true
     },
     "asn1.js": {
diff --git a/package.json b/package.json
index b9fec847..0b1926d4 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,7 @@
     "@rollup/plugin-commonjs": "^11.1.0",
     "@rollup/plugin-node-resolve": "^7.1.3",
     "@rollup/plugin-replace": "^2.3.2",
-    "asmcrypto.js": "github:openpgpjs/asmcrypto#475cffa5ccb2cf2556427056679414acf3610d1b",
+    "asmcrypto.js": "github:openpgpjs/asmcrypto#5b994303a9d3e27e0915f72a10b6c2c51535a4dc",
     "babel-eslint": "^10.1.0",
     "bn.js": "^4.11.8",
     "buffer": "^5.0.8",
diff --git a/src/crypto/cfb.js b/src/crypto/cfb.js
index 440a04b6..67a3289d 100644
--- a/src/crypto/cfb.js
+++ b/src/crypto/cfb.js
@@ -124,13 +124,13 @@ function aesEncrypt(algo, key, pt, iv) {
   }
   // asm.js fallback
   const cfb = new AES_CFB(key, iv);
-  return stream.transform(pt, value => cfb.AES_Encrypt_process(value), () => cfb.AES_Encrypt_finish());
+  return stream.transform(pt, value => cfb.aes.AES_Encrypt_process(value), () => cfb.aes.AES_Encrypt_finish());
 }
 
 function aesDecrypt(algo, key, ct, iv) {
   if (util.isStream(ct)) {
     const cfb = new AES_CFB(key, iv);
-    return stream.transform(ct, value => cfb.AES_Decrypt_process(value), () => cfb.AES_Decrypt_finish());
+    return stream.transform(ct, value => cfb.aes.AES_Decrypt_process(value), () => cfb.aes.AES_Decrypt_finish());
   }
   return AES_CFB.decrypt(ct, key, iv);
 }