diff --git a/keystore/KeyAttestationPackageInfo.cpp b/keystore/KeyAttestationPackageInfo.cpp
index 8092828..75fbb7a 100644
--- a/keystore/KeyAttestationPackageInfo.cpp
+++ b/keystore/KeyAttestationPackageInfo.cpp
@@ -25,17 +25,15 @@
 
 KeyAttestationPackageInfo::KeyAttestationPackageInfo() = default;
 
-KeyAttestationPackageInfo::KeyAttestationPackageInfo(
-        const String16& packageName, int32_t versionCode,
-        SharedSignaturesVector signatures) :
-    packageName_(new String16(packageName)), versionCode_(versionCode),
-    signatures_(signatures) {
-}
+KeyAttestationPackageInfo::KeyAttestationPackageInfo(const String16& packageName,
+                                                     int64_t versionCode,
+                                                     SharedSignaturesVector signatures)
+    : packageName_(new String16(packageName)), versionCode_(versionCode), signatures_(signatures) {}
 
 status_t KeyAttestationPackageInfo::writeToParcel(Parcel* parcel) const {
     auto rc = parcel->writeString16(packageName_);
     if (rc != NO_ERROR) return rc;
-    rc = parcel->writeInt32(versionCode_);
+    rc = parcel->writeInt64(versionCode_);
     if (rc != NO_ERROR) return rc;
     return parcel->writeParcelableVector(signatures_);
 }
@@ -43,7 +41,7 @@
 status_t KeyAttestationPackageInfo::readFromParcel(const Parcel* parcel) {
     auto rc = parcel->readString16(&packageName_);
     if (rc != NO_ERROR) return rc;
-    rc = parcel->readInt32(&versionCode_);
+    rc = parcel->readInt64(&versionCode_);
     if (rc != NO_ERROR) return rc;
 
     std::unique_ptr<SignaturesVector> temp_vector;
diff --git a/keystore/include/keystore/KeyAttestationPackageInfo.h b/keystore/include/keystore/KeyAttestationPackageInfo.h
index efc33a6..92d4863 100644
--- a/keystore/include/keystore/KeyAttestationPackageInfo.h
+++ b/keystore/include/keystore/KeyAttestationPackageInfo.h
@@ -37,22 +37,22 @@
         SignaturesVector;
     typedef std::shared_ptr<SignaturesVector> SharedSignaturesVector;
 
-    KeyAttestationPackageInfo(
-        const String16& packageName, int32_t versionCode, SharedSignaturesVector signatures);
+    KeyAttestationPackageInfo(const String16& packageName, int64_t versionCode,
+                              SharedSignaturesVector signatures);
     KeyAttestationPackageInfo();
 
     status_t writeToParcel(Parcel*) const override;
     status_t readFromParcel(const Parcel* parcel) override;
 
     const std::unique_ptr<String16>& package_name() const { return packageName_; }
-    int32_t version_code() const { return versionCode_; }
+    int64_t version_code() const { return versionCode_; }
 
     ConstSignatureIterator sigs_begin() const { return ConstSignatureIterator(signatures_); }
     ConstSignatureIterator sigs_end() const { return ConstSignatureIterator(); }
 
   private:
     std::unique_ptr<String16> packageName_;
-    int32_t versionCode_;
+    int64_t versionCode_;
     SharedSignaturesVector signatures_;
 };
 
diff --git a/keystore/keystore_attestation_id.cpp b/keystore/keystore_attestation_id.cpp
index 7f9c38d..3d34ac5 100644
--- a/keystore/keystore_attestation_id.cpp
+++ b/keystore/keystore_attestation_id.cpp
@@ -37,6 +37,7 @@
 #include <private/android_filesystem_config.h> /* for AID_SYSTEM */
 
 #include <openssl/asn1t.h>
+#include <openssl/bn.h>
 #include <openssl/sha.h>
 
 #include <utils/String8.h>
@@ -148,10 +149,20 @@
         return UNKNOWN_ERROR;
     }
 
-    if (!ASN1_INTEGER_set(attestation_package_info->version, pinfo.version_code())) {
+    BIGNUM* bn_version = BN_new();
+    if (bn_version == nullptr) {
+        return NO_MEMORY;
+    }
+    if (BN_set_u64(bn_version, static_cast<uint64_t>(pinfo.version_code())) != 1) {
+        BN_free(bn_version);
         return UNKNOWN_ERROR;
     }
-    return NO_ERROR;
+    status_t retval = NO_ERROR;
+    if (BN_to_ASN1_INTEGER(bn_version, attestation_package_info->version) == nullptr) {
+        retval = UNKNOWN_ERROR;
+    }
+    BN_free(bn_version);
+    return retval;
 }
 
 StatusOr<std::vector<uint8_t>>