diff --git a/Gemfile.lock b/Gemfile.lock
index 6d5eb59..97ed3e8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -60,7 +60,7 @@ GEM
     parser (3.2.0.0)
       ast (~> 2.4.1)
     public_suffix (5.0.1)
-    puma (6.3.1)
+    puma (6.4.0)
       nio4r (~> 2.0)
     racc (1.7.1)
     rack (3.0.8)