diff --git a/Gemfile.lock b/Gemfile.lock
index cc5783c..628100b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -190,7 +190,7 @@ GEM
       ast (~> 2.4.0)
     pg (1.2.2)
     public_suffix (4.0.3)
-    puma (4.3.1)
+    puma (4.3.3)
       nio4r (~> 2.0)
     rack (2.2.2)
     rack-pjax (1.1.0)