diff --git a/src/Eccube/Entity/Customer.php b/src/Eccube/Entity/Customer.php
index 75e4361dc84..9f7d4ae3f97 100644
--- a/src/Eccube/Entity/Customer.php
+++ b/src/Eccube/Entity/Customer.php
@@ -15,6 +15,7 @@
 
 use Doctrine\ORM\Mapping as ORM;
 use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
+use Symfony\Component\Security\Core\User\LegacyPasswordAuthenticatedUserInterface;
 use Symfony\Component\Security\Core\User\PasswordAuthenticatedUserInterface;
 use Symfony\Component\Security\Core\User\UserInterface;
 use Symfony\Component\Validator\Constraints as Assert;
@@ -30,7 +31,7 @@
      * @ORM\HasLifecycleCallbacks()
      * @ORM\Entity(repositoryClass="Eccube\Repository\CustomerRepository")
      */
-    class Customer extends \Eccube\Entity\AbstractEntity implements UserInterface, PasswordAuthenticatedUserInterface, \Serializable
+    class Customer extends \Eccube\Entity\AbstractEntity implements UserInterface, PasswordAuthenticatedUserInterface, LegacyPasswordAuthenticatedUserInterface, \Serializable
     {
         /**
          * @var int
@@ -680,7 +681,7 @@ public function setSalt($salt = null)
          *
          * @return string|null
          */
-        public function getSalt()
+        public function getSalt(): ?string
         {
             return $this->salt;
         }
diff --git a/src/Eccube/Entity/Member.php b/src/Eccube/Entity/Member.php
index 3cd2ed0a5e6..14b91b68a90 100644
--- a/src/Eccube/Entity/Member.php
+++ b/src/Eccube/Entity/Member.php
@@ -15,6 +15,7 @@
 
 use Doctrine\ORM\Mapping as ORM;
 use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
+use Symfony\Component\Security\Core\User\LegacyPasswordAuthenticatedUserInterface;
 use Symfony\Component\Security\Core\User\PasswordAuthenticatedUserInterface;
 use Symfony\Component\Security\Core\User\UserInterface;
 use Symfony\Component\Validator\Constraints as Assert;
@@ -30,7 +31,7 @@
      * @ORM\HasLifecycleCallbacks()
      * @ORM\Entity(repositoryClass="Eccube\Repository\MemberRepository")
      */
-    class Member extends \Eccube\Entity\AbstractEntity implements UserInterface, PasswordAuthenticatedUserInterface, \Serializable
+    class Member extends \Eccube\Entity\AbstractEntity implements UserInterface, PasswordAuthenticatedUserInterface, LegacyPasswordAuthenticatedUserInterface, \Serializable
     {
         public static function loadValidatorMetadata(ClassMetadata $metadata)
         {
@@ -338,7 +339,7 @@ public function setSalt($salt)
          *
          * @return string
          */
-        public function getSalt()
+        public function getSalt(): ?string
         {
             return $this->salt;
         }
diff --git a/src/Eccube/Security/Core/User/CustomerProvider.php b/src/Eccube/Security/Core/User/CustomerProvider.php
index de809cf53be..f5fcf54776f 100644
--- a/src/Eccube/Security/Core/User/CustomerProvider.php
+++ b/src/Eccube/Security/Core/User/CustomerProvider.php
@@ -13,24 +13,33 @@
 
 namespace Eccube\Security\Core\User;
 
+use Doctrine\ORM\EntityManagerInterface;
 use Eccube\Entity\Customer;
 use Eccube\Entity\Master\CustomerStatus;
 use Eccube\Repository\CustomerRepository;
 use Symfony\Component\Security\Core\Exception\UnsupportedUserException;
 use Symfony\Component\Security\Core\Exception\UserNotFoundException;
+use Symfony\Component\Security\Core\User\PasswordAuthenticatedUserInterface;
+use Symfony\Component\Security\Core\User\PasswordUpgraderInterface;
 use Symfony\Component\Security\Core\User\UserInterface;
 use Symfony\Component\Security\Core\User\UserProviderInterface;
 
-class CustomerProvider implements UserProviderInterface
+class CustomerProvider implements UserProviderInterface, PasswordUpgraderInterface
 {
     /**
      * @var CustomerRepository
      */
     protected $customerRepository;
 
-    public function __construct(CustomerRepository $customerRepository)
+    /**
+     * @var EntityManagerInterface
+     */
+    private $entityManager;
+
+    public function __construct(CustomerRepository $customerRepository, EntityManagerInterface $entityManager)
     {
         $this->customerRepository = $customerRepository;
+        $this->entityManager = $entityManager;
     }
 
     /**
@@ -92,4 +101,10 @@ public function loadUserByIdentifier(string $identifier): UserInterface
         // FIXME deprecated
         return $this->loadUserByUsername($identifier);
     }
+
+    public function upgradePassword(PasswordAuthenticatedUserInterface $user, string $newHashedPassword): void
+    {
+        $user->setPassword($newHashedPassword);
+        $this->entityManager->flush();
+    }
 }
diff --git a/src/Eccube/Security/Core/User/MemberProvider.php b/src/Eccube/Security/Core/User/MemberProvider.php
index e38e298cd73..d6671982a0f 100644
--- a/src/Eccube/Security/Core/User/MemberProvider.php
+++ b/src/Eccube/Security/Core/User/MemberProvider.php
@@ -13,24 +13,33 @@
 
 namespace Eccube\Security\Core\User;
 
+use Doctrine\ORM\EntityManagerInterface;
 use Eccube\Entity\Master\Work;
 use Eccube\Entity\Member;
 use Eccube\Repository\MemberRepository;
 use Symfony\Component\Security\Core\Exception\UnsupportedUserException;
 use Symfony\Component\Security\Core\Exception\UserNotFoundException;
+use Symfony\Component\Security\Core\User\PasswordAuthenticatedUserInterface;
+use Symfony\Component\Security\Core\User\PasswordUpgraderInterface;
 use Symfony\Component\Security\Core\User\UserInterface;
 use Symfony\Component\Security\Core\User\UserProviderInterface;
 
-class MemberProvider implements UserProviderInterface
+class MemberProvider implements UserProviderInterface, PasswordUpgraderInterface
 {
     /**
      * @var MemberRepository
      */
     protected $memberRepository;
 
-    public function __construct(MemberRepository $memberRepository)
+    /**
+     * @var EntityManagerInterface
+     */
+    private $entityManager;
+
+    public function __construct(MemberRepository $memberRepository, EntityManagerInterface $entityManager)
     {
         $this->memberRepository = $memberRepository;
+        $this->entityManager = $entityManager;
     }
 
     /**
@@ -89,4 +98,10 @@ public function loadUserByIdentifier(string $identifier): UserInterface
         // FIXME deprecated
         return $this->loadUserByUsername($identifier);
     }
+
+    public function upgradePassword(PasswordAuthenticatedUserInterface $user, string $newHashedPassword): void
+    {
+        $user->setPassword($newHashedPassword);
+        $this->entityManager->flush();
+    }
 }
diff --git a/tests/Eccube/Tests/Security/PasswordHasher/PasswordMigrationTest.php b/tests/Eccube/Tests/Security/PasswordHasher/PasswordMigrationTest.php
new file mode 100644
index 00000000000..f4cb57bf19b
--- /dev/null
+++ b/tests/Eccube/Tests/Security/PasswordHasher/PasswordMigrationTest.php
@@ -0,0 +1,70 @@
+<?php
+
+/*
+ * This file is part of EC-CUBE
+ *
+ * Copyright(c) EC-CUBE CO.,LTD. All Rights Reserved.
+ *
+ * http://www.ec-cube.co.jp/
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Eccube\Tests\Security\PasswordHasher;
+
+use Eccube\Entity\Member;
+use Eccube\Security\PasswordHasher\PasswordHasher;
+use Eccube\Tests\EccubeTestCase;
+use Eccube\Util\StringUtil;
+use Symfony\Component\PasswordHasher\LegacyPasswordHasherInterface;
+
+class PasswordMigrationTest extends EccubeTestCase
+{
+    /**
+     * @var LegacyPasswordHasherInterface
+     */
+    private $legacyPasswordHasher;
+
+    public function setUp(): void
+    {
+        parent::setUp();
+        $this->legacyPasswordHasher = self::getContainer()->get(PasswordHasher::class);
+    }
+
+    /**
+     * EC-CUBEのハッシュアルゴリズムからSymfony標準のハッシュアルゴリズムへマイグレーションできることを確認する
+     */
+    public function testPasswordMigration()
+    {
+        // 旧アルゴリズムでパスワードをハッシュ化
+        $username = 'migration-test-uesr';
+        $password = 'password';
+        $salt = StringUtil::random();
+        $hash = $this->legacyPasswordHasher->hash($password, $salt);
+
+        $Member = $this->createMember();
+        $Member->setLoginId($username)
+            ->setPassword($hash)
+            ->setSalt($salt);
+        $this->entityManager->flush();
+
+        // ログイン
+        $crawler = $this->client->request('GET', '/admin/login');
+        self::assertTrue($this->client->getResponse()->isSuccessful());
+
+        $form = $crawler->selectButton('ログイン')->form();
+        $form['login_id'] = $username;
+        $form['password'] = $password;
+        $this->client->submit($form);
+
+        self::assertTrue($this->client->getResponse()->isRedirection());
+
+        // ログイン後、パスワードがマイグレーションされていることを確認.
+        $this->entityManager->clear();
+        $Member = $this->entityManager->find(Member::class, $Member->getId());
+
+        self::assertNotSame($hash, $Member->getPassword(), $hash.':'.$Member->getPassword());
+        self::assertStringStartsWith('$', $Member->getPassword(), $Member->getPassword());
+    }
+}