diff --git a/Gemfile.lock b/Gemfile.lock
index b21c440..124b71c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -65,7 +65,7 @@ GEM
     parser (2.7.0.2)
       ast (~> 2.4.0)
     pg (1.2.2)
-    puma (4.3.1)
+    puma (4.3.3)
       nio4r (~> 2.0)
     rack (2.2.2)
     rack-accept (0.4.5)