diff --git a/Procfile b/Procfile
index b9b4d97..8fd8940 100644
--- a/Procfile
+++ b/Procfile
@@ -1 +1 @@
-web: bundle exec unicorn -p $PORT -c ./config/unicorn.default.rb
+web: bundle exec unicorn -c ./config/unicorn.default.rb
diff --git a/config/unicorn.default.rb b/config/unicorn.default.rb
index 3cd7d2c..2951dcd 100644
--- a/config/unicorn.default.rb
+++ b/config/unicorn.default.rb
@@ -3,7 +3,7 @@
 worker_processes 3 # amount of unicorn workers to spin up
 timeout 30         # restarts workers that hang for 30 seconds
 preload_app true
-listen 8080
+listen ENV['PORT'] || 8080
 pid ENV['UNICORN_PID'] if ENV['UNICORN_PID']
 
 # Taken from github: https://github.com/blog/517-unicorn
--
libgit2 0.21.2