```
diff --git a/src/auth/PhutilLDAPAuthAdapter.php b/src/auth/PhutilLDAPAuthAdapter.php
index 16847fd..ec58cea 100644
--- a/src/auth/PhutilLDAPAuthAdapter.php
+++ b/src/auth/PhutilLDAPAuthAdapter.php
@@ -305,6 +305,7 @@ final class PhutilLDAPAuthAdapter extends PhutilAuthAdapter {
'port' => $this->port,
));
+ putenv('LDAPTLS_REQCERT=never');
$conn = @ldap_connect($host, $this->port);
$profiler->endServiceCall(
```