diff --git a/Gemfile.lock b/Gemfile.lock
index 6aa7493..9e7e718 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -171,7 +171,7 @@ GEM
     parser (3.3.0.5)
       ast (~> 2.4.1)
       racc
-    pg (1.3.1)
+    pg (1.5.6)
     public_suffix (4.0.6)
     puma (6.4.2)
       nio4r (~> 2.0)