README.md in usps_flags-0.3.20 vs README.md in usps_flags-0.3.21

@@ -2,11 +2,10 @@
 
 [![Gem Version](https://img.shields.io/gem/v/usps_flags.svg)](https://rubygems.org/gems/usps_flags)
 [![Build Status](https://travis-ci.org/jfiander/usps-flags.svg)](https://travis-ci.org/jfiander/usps-flags)
 [![Test Coverage](https://api.codeclimate.com/v1/badges/760b824f0edac3316a11/test_coverage)](https://codeclimate.com/github/jfiander/usps-flags/test_coverage)
 [![Maintainability](https://api.codeclimate.com/v1/badges/760b824f0edac3316a11/maintainability)](https://codeclimate.com/github/jfiander/usps-flags/maintainability)
-[![Dependencies](https://img.shields.io/gemnasium/jfiander/usps-flags.svg)](https://gemnasium.com/github.com/jfiander/usps-flags)
 
 This gem allows you to generate precise SVG and PNG flag images based on
 official specifications.
 
 ## Installation
@@ -140,30 +139,13 @@
 [USPSFlags::Burgees](https://github.com/jfiander/usps-flags_burgees)
 
 There is an extension to this gem for handling grade insignia:
 [USPSFlags::Grades](https://github.com/jfiander/usps-flags_grades)
 
-## Security
-
-This gem is cryptographically signed. To be sure the gem code hasn’t been
-tampered with:
-
-Add my public key as a trusted certificate:
-
-```sh
-gem cert --add <(curl -Ls https://raw.github.com/jfiander/usps-flags/master/certs/jfiander.pem)
-```
-
-Then install the gem securely:
-
-```sh
-gem install usps_flags -P HighSecurity
-```
-
 ## License
 
 Actual images generated (other than the US Ensign) are
-[registered trademarks](http://www.usps.org/national/itcom/trademark.html) of
+[registered trademarks](https://www.usps.org/images/secretary/itcom/trademark.pdf) of
 United States Power Squadrons.
 
 This project is released under the
 [GPLv3](https://raw.github.com/jfiander/usps-flags/master/LICENSE).