diff --git a/fastlane/lib/fastlane/actions/increment_build_number.rb b/fastlane/lib/fastlane/actions/increment_build_number.rb
index 7c96df6e551..6e380387c53 100644
--- a/fastlane/lib/fastlane/actions/increment_build_number.rb
+++ b/fastlane/lib/fastlane/actions/increment_build_number.rb
@@ -66,11 +66,10 @@ def self.available_options
                                        env_name: "FL_BUILD_NUMBER_BUILD_NUMBER",
                                        description: "Change to a specific version. When you provide this parameter, Apple Generic Versioning does not have to be enabled",
                                        optional: true,
-                                       is_string: false),
+                                       skip_type_validation: true), # allow Integer, String
           FastlaneCore::ConfigItem.new(key: :skip_info_plist,
                                        env_name: "FL_BUILD_NUMBER_SKIP_INFO_PLIST",
                                        description: "Don't update Info.plist files when updating the build version",
-                                       is_string: false,
                                        type: Boolean,
                                        default_value: false),
           FastlaneCore::ConfigItem.new(key: :xcodeproj,
diff --git a/fastlane/spec/actions_specs/increment_build_number_action_spec.rb b/fastlane/spec/actions_specs/increment_build_number_spec.rb
similarity index 100%
rename from fastlane/spec/actions_specs/increment_build_number_action_spec.rb
rename to fastlane/spec/actions_specs/increment_build_number_spec.rb