diff --git a/lib/letters/patch/object.rb b/lib/letters/patch/object.rb
index 7bde3fb..126a5fb 100644
--- a/lib/letters/patch/object.rb
+++ b/lib/letters/patch/object.rb
@@ -1,4 +1,3 @@
 require "letters/patch"
 
 Letters.patch! Object
-Letters.patch! NilClass
diff --git a/lib/letters/patch/rails.rb b/lib/letters/patch/rails.rb
new file mode 100644
index 0000000..92dfb98
--- /dev/null
+++ b/lib/letters/patch/rails.rb
@@ -0,0 +1,9 @@
+require "letters/core"
+
+begin
+  Letters.patch! ActiveRecord::Base
+  Letters.patch! ActionController::Base
+  Letters.patch! ActionMailer::Base
+rescue
+  $stderr.puts "[warning] tried to patch Rails without Rails being loaded"
+end