diff --git a/src/Repositories/AccessTokenRepositoryInterface.php b/src/Repositories/AccessTokenRepositoryInterface.php
index 04e98bc6..72ddf1f4 100644
--- a/src/Repositories/AccessTokenRepositoryInterface.php
+++ b/src/Repositories/AccessTokenRepositoryInterface.php
@@ -12,6 +12,7 @@ namespace League\OAuth2\Server\Repositories;
 use League\OAuth2\Server\Entities\AccessTokenEntityInterface;
 use League\OAuth2\Server\Entities\ClientEntityInterface;
 use League\OAuth2\Server\Entities\ScopeEntityInterface;
+use League\OAuth2\Server\Exception\UniqueTokenIdentifierConstraintViolationException;
 
 /**
  * Access token interface.
@@ -33,6 +34,8 @@ interface AccessTokenRepositoryInterface extends RepositoryInterface
      * Persists a new access token to permanent storage.
      *
      * @param AccessTokenEntityInterface $accessTokenEntity
+     *
+     * @throws UniqueTokenIdentifierConstraintViolationException
      */
     public function persistNewAccessToken(AccessTokenEntityInterface $accessTokenEntity);
 
diff --git a/src/Repositories/AuthCodeRepositoryInterface.php b/src/Repositories/AuthCodeRepositoryInterface.php
index 4d23439a..2dc285b8 100644
--- a/src/Repositories/AuthCodeRepositoryInterface.php
+++ b/src/Repositories/AuthCodeRepositoryInterface.php
@@ -10,6 +10,7 @@
 namespace League\OAuth2\Server\Repositories;
 
 use League\OAuth2\Server\Entities\AuthCodeEntityInterface;
+use League\OAuth2\Server\Exception\UniqueTokenIdentifierConstraintViolationException;
 
 /**
  * Auth code storage interface.
@@ -27,6 +28,8 @@ interface AuthCodeRepositoryInterface extends RepositoryInterface
      * Persists a new auth code to permanent storage.
      *
      * @param AuthCodeEntityInterface $authCodeEntity
+     *
+     * @throws UniqueTokenIdentifierConstraintViolationException
      */
     public function persistNewAuthCode(AuthCodeEntityInterface $authCodeEntity);
 
diff --git a/src/Repositories/RefreshTokenRepositoryInterface.php b/src/Repositories/RefreshTokenRepositoryInterface.php
index d7e686cc..0c0697bf 100644
--- a/src/Repositories/RefreshTokenRepositoryInterface.php
+++ b/src/Repositories/RefreshTokenRepositoryInterface.php
@@ -10,6 +10,7 @@
 namespace League\OAuth2\Server\Repositories;
 
 use League\OAuth2\Server\Entities\RefreshTokenEntityInterface;
+use League\OAuth2\Server\Exception\UniqueTokenIdentifierConstraintViolationException;
 
 /**
  * Refresh token interface.
@@ -27,6 +28,8 @@ interface RefreshTokenRepositoryInterface extends RepositoryInterface
      * Create a new refresh token_name.
      *
      * @param RefreshTokenEntityInterface $refreshTokenEntity
+     *
+     * @throws UniqueTokenIdentifierConstraintViolationException
      */
     public function persistNewRefreshToken(RefreshTokenEntityInterface $refreshTokenEntity);