diff --git a/Gemfile.lock b/Gemfile.lock
index 341522f..db7ce9e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -203,7 +203,7 @@ GEM
     parallel (1.22.1)
     parser (3.2.1.1)
       ast (~> 2.4.1)
-    pg (1.4.6)
+    pg (1.5.9)
     protocol-hpack (1.4.2)
     protocol-http (0.25.0)
     protocol-http1 (0.16.1)