diff --git a/Gemfile.lock b/Gemfile.lock
index 2ed9d38..48e2cc7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -205,7 +205,6 @@
     mysql2 (0.3.21)
     nokogiri (1.8.1)
       mini_portile2 (~> 2.3.0)
-      pkg-config (~> 1.1.7)
     normalize-rails (4.1.1)
     oauth2 (1.2.0)
       faraday (>= 0.8, < 0.10)
@@ -225,7 +224,6 @@
       omniauth (>= 1.0.0)
     orm_adapter (0.5.0)
     pg (0.19.0)
-    pkg-config (1.1.7)
     po_to_json (1.0.1)
       json (>= 1.6.0)
     protected_attributes (1.1.3)