diff --git a/app/models/concerns/ldap_authenticable.rb b/app/models/concerns/ldap_authenticable.rb
index dc5abcd5a..775df0817 100644
--- a/app/models/concerns/ldap_authenticable.rb
+++ b/app/models/concerns/ldap_authenticable.rb
@@ -6,7 +6,7 @@ module LdapAuthenticable
   class_methods do
     def authenticate_with_ldap(params = {})
       ldap   = Net::LDAP.new(ldap_options)
-      filter = format(Devise.ldap_search_filter, uid: Devise.ldap_uid, mail: Devise.ldap_mail, email: params[:email])
+      filter = format(Devise.ldap_search_filter, uid: Devise.ldap_uid, mail: Devise.ldap_mail, email: Net::LDAP::Filter.escape(params[:email]))
 
       if (user_info = ldap.bind_as(base: Devise.ldap_base, filter: filter, password: params[:password]))
         ldap_get_user(user_info.first)