diff --git a/Gemfile b/Gemfile
index a1313f617..3f80e92e1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,6 +3,8 @@
 source 'https://rubygems.org'
 ruby '2.4.1'
 
+gem 'pkg-config'
+
 gem 'rails', '~> 5.0.2'
 gem 'sass-rails', '~> 5.0'
 gem 'uglifier', '>= 1.3.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index c7ea894dc..2618f47f2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -266,6 +266,7 @@ GEM
     pg (0.20.0)
     pghero (1.6.4)
       activerecord
+    pkg-config (1.1.7)
     powerpack (0.1.1)
     pry (0.10.4)
       coderay (~> 1.1.0)
@@ -496,6 +497,7 @@ DEPENDENCIES
   paperclip-av-transcoder
   pg
   pghero
+  pkg-config
   pry-rails
   puma
   rabl