diff --git a/Gemfile.lock b/Gemfile.lock
index 6abd4b940..94fa80f65 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -285,7 +285,7 @@ GEM
     polyamorous (1.3.0)
       activerecord (>= 3.0)
     posix-spawn (0.3.11)
-    puma (3.4.0)
+    puma (3.9.1)
     pundit (1.1.0)
       activesupport (>= 3.0.0)
     pygments.rb (0.6.3)