diff --git a/web/Gemfile.lock b/web/Gemfile.lock
index b3389c2..c30c334 100644
--- a/web/Gemfile.lock
+++ b/web/Gemfile.lock
@@ -63,7 +63,7 @@ GEM
     nokogiri (1.6.7.2)
       mini_portile2 (~> 2.0.0.rc2)
     obscenity (1.0.2)
-    puma (3.1.0)
+    puma (3.12.6)
     rack (2.0.0.alpha)
       json
     rack-test (0.6.3)