diff --git a/Gemfile.lock b/Gemfile.lock
index 504b98c..cc28c6f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -206,7 +206,7 @@ GEM
       method_source (~> 0.8.1)
       slop (~> 3.4)
     public_suffix (3.0.2)
-    puma (3.9.1)
+    puma (3.11.2)
     rack (2.0.4)
     rack-test (0.8.2)
       rack (>= 1.0, < 3)