diff --git a/Gemfile.lock b/Gemfile.lock
index 8fada7e7c..86fa15f81 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -270,7 +270,7 @@ GEM
       method_source (~> 0.8.1)
       slop (~> 3.4)
     public_suffix (4.0.1)
-    puma (4.2.1)
+    puma (4.3.1)
       nio4r (~> 2.0)
     que (0.14.3)
     que-web (0.7.2)