diff --git a/Gemfile.lock b/Gemfile.lock
index 52fceb6..434fe90 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -213,7 +213,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     public_suffix (3.0.1)
-    puma (3.11.0)
+    puma (3.12.2)
     rack (2.0.5)
     rack-cache (1.7.1)
       rack (>= 0.4)