diff --git a/fastlane/lib/fastlane/actions/install_on_device.rb b/fastlane/lib/fastlane/actions/install_on_device.rb
index 63db0239a08..bc663cdc9ff 100644
--- a/fastlane/lib/fastlane/actions/install_on_device.rb
+++ b/fastlane/lib/fastlane/actions/install_on_device.rb
@@ -35,26 +35,23 @@ def self.available_options
                                        short_option: "-X",
                                        env_name: "FL_IOD_EXTRA",
                                        description: "Extra Commandline arguments passed to ios-deploy",
-                                       optional: true,
-                                       is_string: true),
+                                       optional: true),
           FastlaneCore::ConfigItem.new(key: :device_id,
                                        short_option: "-d",
                                        env_name: "FL_IOD_DEVICE_ID",
                                        description: "id of the device / if not set defaults to first found device",
-                                       optional: true,
-                                       is_string: true),
+                                       optional: true),
           FastlaneCore::ConfigItem.new(key: :skip_wifi,
                                        short_option: "-w",
                                        env_name: "FL_IOD_WIFI",
                                        description: "Do not search for devices via WiFi",
                                        optional: true,
-                                       is_string: false),
+                                       type: Boolean),
           FastlaneCore::ConfigItem.new(key: :ipa,
                                        short_option: "-i",
                                        env_name: "FL_IOD_IPA",
                                        description: "The IPA file to put on the device",
                                        optional: true,
-                                       is_string: true,
                                        default_value: Actions.lane_context[SharedValues::IPA_OUTPUT_PATH] || Dir["*.ipa"].first,
                                        default_value_dynamic: true,
                                        verify_block: proc do |value|