diff --git a/Gemfile.lock b/Gemfile.lock
index 60cd06c54..87cf2d7d9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -318,7 +318,7 @@ GEM
     pry-rails (0.3.9)
       pry (>= 0.10.4)
     public_suffix (4.0.6)
-    puma (4.3.11)
+    puma (4.3.12)
       nio4r (~> 2.0)
     racc (1.6.0)
     rack (2.2.3)