diff --git a/lib/dotenv/environment.rb b/lib/dotenv/environment.rb
index 2533113..de0c153 100644
--- a/lib/dotenv/environment.rb
+++ b/lib/dotenv/environment.rb
@@ -2,9 +2,10 @@ module Dotenv
   # This class inherits from Hash and represents the environment into which
   # Dotenv will load key value pairs from a file.
   class Environment < Hash
-    attr_reader :filename
+    attr_reader :filename, :overwrite
 
     def initialize(filename, overwrite: false)
+      super()
       @filename = filename
       @overwrite = overwrite
       load
diff --git a/lib/dotenv/rails.rb b/lib/dotenv/rails.rb
index 4c08cf3..90b33b0 100644
--- a/lib/dotenv/rails.rb
+++ b/lib/dotenv/rails.rb
@@ -19,6 +19,7 @@ class Rails < ::Rails::Railtie
     attr_accessor :overwrite, :files
 
     def initialize
+      super()
       @overwrite = false
       @files = [
         root.join(".env.#{env}.local"),