diff --git a/passbook/lib/default.yml b/passbook/lib/default.yml
index 0e2041c927..05c179fa15 100644
--- a/passbook/lib/default.yml
+++ b/passbook/lib/default.yml
@@ -58,6 +58,7 @@ passbook:
   # Specify which fields can be used to authenticate. Can be any combination of `username` and `email`
   uid_fields:
     - username
+    - email
   session:
     remember_age: 2592000 # 60 * 60 * 24 * 30, one month
 # Provider-specific settings
@@ -114,4 +115,4 @@ saml_idp:
     - passbook.saml_idp.processors.nextcloud
     - passbook.saml_idp.processors.salesforce
     - passbook.saml_idp.processors.shibboleth
-    - passbook.saml_idp.processors.wordpress_orange
\ No newline at end of file
+    - passbook.saml_idp.processors.wordpress_orange