diff --git a/Gemfile.lock b/Gemfile.lock
index f9fa90f..4be4f77 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -108,7 +108,7 @@ GEM
     pry (0.11.3)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    puma (3.12.1)
+    puma (3.12.4)
     rack (1.6.12)
     rack-test (0.6.3)
       rack (>= 1.0)