diff --git a/Gemfile.lock b/Gemfile.lock
index aeadb6e..b006855 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -158,7 +158,7 @@ GEM
     pg (1.5.9)
     psych (5.1.2)
       stringio
-    puma (6.4.3)
+    puma (6.6.0)
       nio4r (~> 2.0)
     racc (1.8.1)
     rack (3.1.8)