diff --git a/Gemfile.lock b/Gemfile.lock
index d930e94..201330d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -88,7 +88,7 @@ GEM
       bundler (>= 1.2.0)
       thor (~> 1.0)
     concurrent-ruby (1.3.5)
-    connection_pool (2.5.5)
+    connection_pool (3.0.2)
     crass (1.0.6)
     date (3.5.0)
     debug (1.11.0)