diff --git a/Gemfile.lock b/Gemfile.lock
index 4c528c2..2da5467 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -49,7 +49,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    puma (4.3.3)
+    puma (4.3.5)
       nio4r (~> 2.0)
     rack (1.6.13)
     rack-flash (0.1.2)