Use canonical url

README.md

@@ -4,7 +4,7 @@
 [![AppVeyor Build Status](https://ci.appveyor.com/api/projects/status/github/hadley/testthat?branch=master&svg=true)](https://ci.appveyor.com/project/hadley/testthat)
 [![Coverage Status](https://img.shields.io/codecov/c/github/hadley/testthat/master.svg)](https://codecov.io/github/hadley/testthat?branch=master)
 [![CRAN RStudio mirror downloads](http://cranlogs.r-pkg.org/badges/testthat)](http://cran.r-project.org/web/packages/testthat/index.html)
-[![CRAN version](http://www.r-pkg.org/badges/version/testthat)](http://cran.r-project.org/web/packages/testthat/index.html)
+[![CRAN version](http://www.r-pkg.org/badges/version/testthat)](http://cran.r-project.org/package=testthat)
 
 Testing your code is normally painful and boring. `testthat` tries to make testing as fun as possible, so that you get a visceral satisfaction from writing tests. Testing should be fun, not a drag, so you do it all the time. To make that happen, `testthat`: