diff --git a/app/models/fluentd/setting/type/regexp.rb b/app/models/fluentd/setting/type/regexp.rb
new file mode 100644
index 0000000..8210b14
--- /dev/null
+++ b/app/models/fluentd/setting/type/regexp.rb
@@ -0,0 +1,17 @@
+class Fluentd
+  module Setting
+    module Type
+      class Regexp < ActiveModel::Type::Value
+        def type
+          :regexp
+        end
+
+        private
+
+        def cast_value(value)
+          value
+        end
+      end
+    end
+  end
+end
diff --git a/config/initializers/types.rb b/config/initializers/types.rb
index 598f80e..1e20ff6 100644
--- a/config/initializers/types.rb
+++ b/config/initializers/types.rb
@@ -2,5 +2,6 @@ ActiveModel::Type.register(:array, Fluentd::Setting::Type::Array)
 ActiveModel::Type.register(:enum, Fluentd::Setting::Type::Enum)
 ActiveModel::Type.register(:bool, Fluentd::Setting::Type::Bool)
 ActiveModel::Type.register(:hash, Fluentd::Setting::Type::Hash)
+ActiveModel::Type.register(:regexp, Fluentd::Setting::Type::Hash)
 ActiveModel::Type.register(:size, Fluentd::Setting::Type::Size)
 ActiveModel::Type.register(:section, Fluentd::Setting::Type::Section)