diff --git a/sig/options.rbs b/sig/options.rbs
index 2e74883f..adeeb498 100644
--- a/sig/options.rbs
+++ b/sig/options.rbs
@@ -13,8 +13,7 @@ module HTTPX
     type timeout_type = :connect_timeout | :settings_timeout | :operation_timeout | :keep_alive_timeout | :total_timeout
     type timeout = Hash[timeout_type, Numeric?]
 
-    def self.new: (options) -> instance
-                | () -> instance
+    def self.new: (?options) -> instance
 
     def self.def_option: (Symbol, ?String) -> void
                        | (Symbol) { (*nil) -> untyped } -> void
diff --git a/sig/plugins/persistent.rbs b/sig/plugins/persistent.rbs
index efa50f3b..c64dbfae 100644
--- a/sig/plugins/persistent.rbs
+++ b/sig/plugins/persistent.rbs
@@ -3,11 +3,7 @@ module HTTPX
     module Persistent
       def self.load_dependencies: (singleton(Session)) -> void
 
-      interface _PersistentOptions
-        def persistent: () -> bool?
-      end
-
-      def self.extra_options: (Options) -> (Options & _PersistentOptions)
+      def self.extra_options: (Options) -> (Options)
     end
 
     type sessionPersistent = sessionFollowRedirects