diff --git a/lib/postal/config.rb b/lib/postal/config.rb
index 776f79e..51d4f88 100644
--- a/lib/postal/config.rb
+++ b/lib/postal/config.rb
@@ -145,7 +145,7 @@ module Postal
       ActiveRecord::Base.connection_pool.disconnect!
 
       config = ActiveRecord::Base.configurations
-                                 .configs_for(env_name: Rails.env)
+                                 .configs_for(env_name: Config.rails.environment)
                                  .first
                                  .configuration_hash
 
@@ -173,7 +173,7 @@ module Postal
     private
 
     def read_version_file(file)
-      path = Rails.root.join(file)
+      path = File.expand_path("../../../" + file, __FILE__)
       return unless File.exist?(path)
 
       value = File.read(path).strip
diff --git a/script/version.rb b/script/version.rb
index c8db897..b51ec55 100755
--- a/script/version.rb
+++ b/script/version.rb
@@ -1,5 +1,5 @@
 #!/usr/bin/env ruby
 # frozen_string_literal: true
 
-require File.expand_path("../lib/postal/version", __dir__)
+require File.expand_path("../lib/postal/config", __dir__)
 puts Postal.version