diff --git a/Gemfile.lock b/Gemfile.lock
index 59aaf00..fb5acc2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -206,7 +206,7 @@ GEM
     pry-rails (0.3.9)
       pry (>= 0.10.4)
     public_suffix (4.0.3)
-    puma (4.3.1)
+    puma (4.3.3)
       nio4r (~> 2.0)
     rack (2.1.1)
     rack-test (1.1.0)