diff --git a/.simplecov b/.simplecov
index 4f3baca..af526eb 100644
--- a/.simplecov
+++ b/.simplecov
@@ -1 +1,8 @@
+require 'coveralls'
+
+SimpleCov.formatter = SimpleCov::Formatter::MultiFormatter[
+  SimpleCov::Formatter::HTMLFormatter,
+  Coveralls::SimpleCov::Formatter,
+]
+
 SimpleCov.start
diff --git a/Gemfile b/Gemfile
index 8e17f84..222c596 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,3 +2,5 @@ source 'https://rubygems.org'
 
 # Specify your gem's dependencies in lita-tox.gemspec
 gemspec
+
+gem 'coveralls', require: false