diff --git a/src/mechs/aes/crypto.ts b/src/mechs/aes/crypto.ts
index 2575ecc..6d6efa1 100644
--- a/src/mechs/aes/crypto.ts
+++ b/src/mechs/aes/crypto.ts
@@ -38,7 +38,7 @@ export class AesCrypto {
 
     switch (format.toLowerCase()) {
       case "jwk":
-        key = JsonParser.fromJSON(keyData, AesCryptoKey);
+        key = JsonParser.fromJSON(keyData, { targetSchema: AesCryptoKey });
         break;
       case "raw":
         key = new AesCryptoKey();
diff --git a/src/mechs/des/crypto.ts b/src/mechs/des/crypto.ts
index 40f5681..ce049c6 100644
--- a/src/mechs/des/crypto.ts
+++ b/src/mechs/des/crypto.ts
@@ -33,7 +33,7 @@ export class DesCrypto {
 
     switch (format.toLowerCase()) {
       case "jwk":
-        key = JsonParser.fromJSON(keyData, DesCryptoKey);
+        key = JsonParser.fromJSON(keyData, { targetSchema: DesCryptoKey });
         break;
       case "raw":
         key = new DesCryptoKey();
diff --git a/src/mechs/ec/crypto.ts b/src/mechs/ec/crypto.ts
index 0cf11ea..f5ccdb8 100644
--- a/src/mechs/ec/crypto.ts
+++ b/src/mechs/ec/crypto.ts
@@ -120,10 +120,10 @@ export class EcCrypto {
       case "jwk":
         const jwk = keyData as JsonWebKey;
         if (jwk.d) {
-          const asnKey = JsonParser.fromJSON(keyData, asn.EcPrivateKey);
+          const asnKey = JsonParser.fromJSON(keyData, { targetSchema: asn.EcPrivateKey });
           return this.importPrivateKey(asnKey, algorithm, extractable, keyUsages);
         } else {
-          const asnKey = JsonParser.fromJSON(keyData, asn.EcPublicKey);
+          const asnKey = JsonParser.fromJSON(keyData, { targetSchema: asn.EcPublicKey });
           return this.importPublicKey(asnKey, algorithm, extractable, keyUsages);
         }
       case "raw": {
diff --git a/src/mechs/ec/private_key.ts b/src/mechs/ec/private_key.ts
index 274c3fb..49eb197 100644
--- a/src/mechs/ec/private_key.ts
+++ b/src/mechs/ec/private_key.ts
@@ -38,7 +38,7 @@ export class EcPrivateKey extends AsymmetricKey implements IJsonConvertible {
     keyInfo.privateKeyAlgorithm.parameters = AsnSerializer.serialize(
       new ObjectIdentifier(getOidByNamedCurve(json.crv!)),
     );
-    const key = JsonParser.fromJSON(json, asn.EcPrivateKey);
+    const key = JsonParser.fromJSON(json, { targetSchema: asn.EcPrivateKey });
     keyInfo.privateKey = AsnSerializer.serialize(key);
 
     this.data = Buffer.from(AsnSerializer.serialize(keyInfo));
diff --git a/src/mechs/ec/public_key.ts b/src/mechs/ec/public_key.ts
index 4c1ac12..88c85d6 100644
--- a/src/mechs/ec/public_key.ts
+++ b/src/mechs/ec/public_key.ts
@@ -29,7 +29,7 @@ export class EcPublicKey extends AsymmetricKey implements IJsonConvertible {
   }
 
   public fromJSON(json: JsonWebKey) {
-    const key = JsonParser.fromJSON(json, asn.EcPublicKey);
+    const key = JsonParser.fromJSON(json, { targetSchema: asn.EcPublicKey });
 
     const keyInfo = new asn.PublicKeyInfo();
     keyInfo.publicKeyAlgorithm.algorithm = "1.2.840.10045.2.1";
diff --git a/src/mechs/hmac/hmac.ts b/src/mechs/hmac/hmac.ts
index 8aae409..6c11e4b 100644
--- a/src/mechs/hmac/hmac.ts
+++ b/src/mechs/hmac/hmac.ts
@@ -40,7 +40,7 @@ export class HmacProvider extends core.HmacProvider {
 
     switch (format.toLowerCase()) {
       case "jwk":
-        key = JsonParser.fromJSON(keyData, HmacCryptoKey);
+        key = JsonParser.fromJSON(keyData, { targetSchema: HmacCryptoKey });
         break;
       case "raw":
         key = new HmacCryptoKey();
diff --git a/src/mechs/rsa/crypto.ts b/src/mechs/rsa/crypto.ts
index e9eadcc..0c3e0b5 100644
--- a/src/mechs/rsa/crypto.ts
+++ b/src/mechs/rsa/crypto.ts
@@ -77,10 +77,10 @@ export class RsaCrypto {
       case "jwk":
         const jwk = keyData as JsonWebKey;
         if (jwk.d) {
-          const asnKey = JsonParser.fromJSON(keyData, asn.RsaPrivateKey);
+          const asnKey = JsonParser.fromJSON(keyData, { targetSchema: asn.RsaPrivateKey });
           return this.importPrivateKey(asnKey, algorithm, extractable, keyUsages);
         } else {
-          const asnKey = JsonParser.fromJSON(keyData, asn.RsaPublicKey);
+          const asnKey = JsonParser.fromJSON(keyData, { targetSchema: asn.RsaPublicKey });
           return this.importPublicKey(asnKey, algorithm, extractable, keyUsages);
         }
       case "spki": {
diff --git a/src/mechs/rsa/private_key.ts b/src/mechs/rsa/private_key.ts
index 09a2415..494cb53 100644
--- a/src/mechs/rsa/private_key.ts
+++ b/src/mechs/rsa/private_key.ts
@@ -27,7 +27,7 @@ export class RsaPrivateKey extends AsymmetricKey {
   }
 
   public fromJSON(json: JsonWebKey) {
-    const key = JsonParser.fromJSON(json, asn.RsaPrivateKey);
+    const key = JsonParser.fromJSON(json, { targetSchema: asn.RsaPrivateKey });
 
     const keyInfo = new asn.PrivateKeyInfo();
     keyInfo.privateKeyAlgorithm.algorithm = "1.2.840.113549.1.1.1";
diff --git a/src/mechs/rsa/public_key.ts b/src/mechs/rsa/public_key.ts
index d5f43d5..41984d1 100644
--- a/src/mechs/rsa/public_key.ts
+++ b/src/mechs/rsa/public_key.ts
@@ -27,7 +27,7 @@ export class RsaPublicKey extends AsymmetricKey {
   }
 
   public fromJSON(json: JsonWebKey) {
-    const key = JsonParser.fromJSON(json, asn.RsaPublicKey);
+    const key = JsonParser.fromJSON(json, { targetSchema: asn.RsaPublicKey });
 
     const keyInfo = new asn.PublicKeyInfo();
     keyInfo.publicKeyAlgorithm.algorithm = "1.2.840.113549.1.1.1";
diff --git a/test/asn.ts b/test/asn.ts
index 5efcefe..d9c9c71 100644
--- a/test/asn.ts
+++ b/test/asn.ts
@@ -30,7 +30,7 @@ context("ASN", () => {
       });
 
       it("serialize", () => {
-        const key = JsonParser.fromJSON(json, asn.RsaPrivateKey);
+        const key = JsonParser.fromJSON(json, { targetSchema: asn.RsaPrivateKey });
 
         const keyInfo = new asn.PrivateKeyInfo();
         keyInfo.privateKeyAlgorithm.algorithm = "1.2.840.113549.1.1.1";
@@ -60,7 +60,7 @@ context("ASN", () => {
       });
 
       it("serialize", () => {
-        const key = JsonParser.fromJSON(json, asn.RsaPublicKey);
+        const key = JsonParser.fromJSON(json, { targetSchema: asn.RsaPublicKey });
 
         const keyInfo = new asn.PublicKeyInfo();
         keyInfo.publicKeyAlgorithm.algorithm = "1.2.840.113549.1.1.1";
@@ -100,7 +100,7 @@ context("ASN", () => {
         keyInfo.privateKeyAlgorithm.parameters = AsnSerializer.serialize(
           new asn.ObjectIdentifier("1.2.840.10045.3.1.7"),
         );
-        const key = JsonParser.fromJSON(json, asn.EcPrivateKey);
+        const key = JsonParser.fromJSON(json, { targetSchema: asn.EcPrivateKey });
         keyInfo.privateKey = AsnSerializer.serialize(key);
 
         const asnKeyInfo = Buffer.from(AsnSerializer.serialize(keyInfo));