diff --git a/Gemfile.lock b/Gemfile.lock
index b78908c..e3b2a18 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -101,7 +101,7 @@ GEM
       tilt (~> 1.4.1)
     padrino-support (0.12.4)
       activesupport (>= 3.1)
-    puma (3.12.2)
+    puma (3.12.3)
     rack (1.6.4)
     rack-livereload (0.3.15)
       rack