diff --git a/rb/sig/lib/selenium/webdriver/common/selenium_manager.rbs b/rb/sig/lib/selenium/webdriver/common/selenium_manager.rbs
index df526c798dbe0..f4f0c58f00d81 100644
--- a/rb/sig/lib/selenium/webdriver/common/selenium_manager.rbs
+++ b/rb/sig/lib/selenium/webdriver/common/selenium_manager.rbs
@@ -4,25 +4,27 @@ module Selenium
       include _Platform
       include Open3
 
-      self.@bin_path: untyped
+      self.@bin_path: String
 
-      self.@binary: untyped
+      self.@binary: String
 
-      attr_writer self.bin_path: untyped
+      attr_writer self.bin_path: String
 
-      def self.bin_path: () -> untyped
+      def self.bin_path: () -> String
 
-      def self.driver_path: (untyped options) -> untyped
+      def self.binary_paths: (Array[String] arguments) -> Hash[untyped, Array[String]]
 
       private
 
       def self.generate_command: (untyped binary, untyped options) -> untyped
 
-      def self.binary: () -> untyped
+      def self.binary: () -> String
 
       def self.validate_location: (untyped location) -> untyped
 
-      def self.run: (*untyped command) -> untyped
+      def self.run: (String | Array[String] command) -> Hash[String, Array[String]]
+
+      def self.platform_location: -> String
     end
   end
 end