diff --git a/src/AuthorizationValidators/BearerTokenValidator.php b/src/AuthorizationValidators/BearerTokenValidator.php
index 98ff615e3..0442dd48e 100644
--- a/src/AuthorizationValidators/BearerTokenValidator.php
+++ b/src/AuthorizationValidators/BearerTokenValidator.php
@@ -74,20 +74,13 @@ private function initJwtConfiguration(): void
             throw new RuntimeException('Public key is empty');
         }
 
-        $validationConstraints = [
+        $this->jwtConfiguration->setValidationConstraints(
             new LooseValidAt($clock, $this->jwtValidAtDateLeeway),
             new SignedWith(
                 new Sha256(),
                 InMemory::plainText($publicKeyContents, $this->publicKey->getPassPhrase() ?? '')
-            ),
-        ];
-
-        // TODO: next major release: bump lcobucci/jwt to ^5.5 and remove the following check
-        if (method_exists($this->jwtConfiguration, 'withValidationConstraints') === true) {
-            $this->jwtConfiguration = $this->jwtConfiguration->withValidationConstraints(...$validationConstraints);
-        } else {
-            $this->jwtConfiguration->setValidationConstraints(...$validationConstraints);
-        }
+            )
+        );
     }
 
     /**