diff --git a/Gemfile.lock b/Gemfile.lock
index 250f857cdace2610e3cc32524334507a6cbf538c..66805010e825cfc20d4595f8e44cf548742a8a0e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -450,7 +450,7 @@ GEM
     pg (1.4.2)
     pghero (2.8.3)
       activerecord (>= 5)
-    pkg-config (1.4.7)
+    pkg-config (1.4.9)
     posix-spawn (0.3.15)
     premailer (1.14.2)
       addressable