diff --git a/fastlane/lib/fastlane/actions/erb.rb b/fastlane/lib/fastlane/actions/erb.rb
index 79b5b3f695d..3dc7549041c 100644
--- a/fastlane/lib/fastlane/actions/erb.rb
+++ b/fastlane/lib/fastlane/actions/erb.rb
@@ -34,20 +34,17 @@ def self.available_options
                                        short_option: "-T",
                                        env_name: "FL_ERB_SRC",
                                        description: "ERB Template File",
-                                       optional: false,
-                                       is_string: true),
+                                       optional: false),
           FastlaneCore::ConfigItem.new(key: :destination,
                                        short_option: "-D",
                                        env_name: "FL_ERB_DST",
                                        description: "Destination file",
-                                       optional: true,
-                                       is_string: true),
+                                       optional: true),
           FastlaneCore::ConfigItem.new(key: :placeholders,
                                        short_option: "-p",
                                        env_name: "FL_ERB_PLACEHOLDERS",
                                        description: "Placeholders given as a hash",
                                        default_value: {},
-                                       is_string: false,
                                        type: Hash),
           FastlaneCore::ConfigItem.new(key: :trim_mode,
                                        short_option: "-t",