diff --git a/Gemfile.lock b/Gemfile.lock
index 653f9b8..8665c6b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -225,7 +225,7 @@ GEM
       railties (>= 3.0.0)
     psych (3.3.4)
     public_suffix (5.0.1)
-    puma (6.2.2)
+    puma (6.3.1)
       nio4r (~> 2.0)
     racc (1.7.1)
     rack (2.2.6.4)