diff --git a/Gemfile.lock b/Gemfile.lock
index 30feb76..01e0837 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -158,7 +158,7 @@ GEM
     pry-stack_explorer (0.4.9.3)
       binding_of_caller (>= 0.7)
       pry (>= 0.9.11)
-    puma (3.12.1)
+    puma (3.12.4)
     rack (1.6.11)
     rack-test (0.6.3)
       rack (>= 1.0)