diff --git a/Gemfile.lock b/Gemfile.lock
index 4f3523d..3d4d1d4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -33,7 +33,7 @@ GEM
       coderay (~> 1.0.5)
       method_source (~> 0.8)
       slop (~> 3.3.1)
-    puma (4.3.1)
+    puma (4.3.5)
       nio4r (~> 2.0)
     rack (2.0.7)
     redis (3.0.2)