diff --git a/Gemfile.lock b/Gemfile.lock
index 7153735..73676a2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -95,7 +95,7 @@ GEM
     pry-rails (0.3.9)
       pry (>= 0.10.4)
     psych (3.1.0)
-    puma (4.3.3)
+    puma (4.3.4)
       nio4r (~> 2.0)
     rack (2.2.2)
     rack-proxy (0.6.5)