diff --git a/src/infrastructure/util/password/PhabricatorBcryptPasswordHasher.php b/src/infrastructure/util/password/PhabricatorBcryptPasswordHasher.php
--- a/src/infrastructure/util/password/PhabricatorBcryptPasswordHasher.php
+++ b/src/infrastructure/util/password/PhabricatorBcryptPasswordHasher.php
@@ -38,7 +38,7 @@
       'cost' => $this->getBcryptCost(),
     );
 
-    $raw_hash = password_hash($raw_input, CRYPT_BLOWFISH, $options);
+    $raw_hash = password_hash($raw_input, PASSWORD_BCRYPT, $options);
 
     return new PhutilOpaqueEnvelope($raw_hash);
   }