diff --git a/Gemfile.lock b/Gemfile.lock
index 972134a..9525e33 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -22,7 +22,7 @@ GEM
     mixpanel-ruby (2.2.0)
     multi_json (1.13.1)
     mustermann (1.0.3)
-    puma (3.12.0)
+    puma (3.12.4)
     rack (2.0.6)
     rack-protection (2.0.4)
       rack