diff --git a/Gemfile.lock b/Gemfile.lock
index 56b892b..d2f3a8f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -217,7 +217,7 @@ GEM
     psych (5.2.0)
       stringio
     public_suffix (6.0.1)
-    puma (6.4.3)
+    puma (6.6.0)
       nio4r (~> 2.0)
     raabro (1.4.0)
     racc (1.8.1)