diff --git a/Gemfile.lock b/Gemfile.lock
index 50fd994..0f6d3f3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -74,7 +74,7 @@ GEM
       byebug (~> 11.0)
       pry (~> 0.10)
     public_suffix (3.1.1)
-    puma (4.3.1)
+    puma (4.3.3)
       nio4r (~> 2.0)
     rack (2.0.8)
     rack-protection (2.0.5)