diff --git a/Gemfile.lock b/Gemfile.lock
index 339f336d0..7c05b90fb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -333,7 +333,7 @@ GEM
     progress (3.5.2)
     psych (3.2.0)
     public_suffix (4.0.5)
-    puma (4.3.5)
+    puma (4.3.6)
       nio4r (~> 2.0)
     quad_tile (1.0.1)
     r2 (0.2.7)