diff --git a/Gemfile.lock b/Gemfile.lock
index 439b583..b30f311 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -93,7 +93,7 @@ GEM
     codecov (0.5.1)
       simplecov (>= 0.15, < 0.22)
     concurrent-ruby (1.1.8)
-    connection_pool (2.2.3)
+    connection_pool (2.3.0)
     crass (1.0.6)
     dalli (2.7.11)
     docile (1.3.5)