diff --git a/Gemfile.lock b/Gemfile.lock
index 71cb825..ece8a02 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -194,7 +194,7 @@ GEM
       prawn (>= 0.6.0)
       rails (>= 3.1)
     public_suffix (2.0.5)
-    puma (3.6.2)
+    puma (3.12.6)
     rack (2.0.1)
     rack-test (0.6.3)
       rack (>= 1.0)