diff --git a/Gemfile.lock b/Gemfile.lock
index b3f5b66ec..fe571816f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -393,7 +393,7 @@ GEM
     pg (1.0.0)
     pghero (2.2.0)
       activerecord
-    pkg-config (1.3.0)
+    pkg-config (1.3.1)
     powerpack (0.1.1)
     premailer (1.11.1)
       addressable