diff --git a/src/symfony/src/Resources/config/doctrine-mapping/PublicKeyCredentialSource.orm.xml b/src/symfony/src/Resources/config/doctrine-mapping/PublicKeyCredentialSource.orm.xml
index 42cb6677..f3329c09 100644
--- a/src/symfony/src/Resources/config/doctrine-mapping/PublicKeyCredentialSource.orm.xml
+++ b/src/symfony/src/Resources/config/doctrine-mapping/PublicKeyCredentialSource.orm.xml
@@ -5,7 +5,7 @@
     xsi:schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping https://raw.github.com/doctrine/doctrine2/master/doctrine-mapping.xsd"
 >
     <mapped-superclass name="Webauthn\PublicKeyCredentialSource">
-        <field name="publicKeyCredentialId" type="base64" unique="true"/>
+        <field name="publicKeyCredentialId" type="base64" unique="true" length="250"/>
         <field name="type"/>
         <field name="transports" type="json"/>
         <field name="attestationType"/>