diff --git a/Gemfile.lock b/Gemfile.lock
index eeb35baf..e16e8ac4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -122,7 +122,7 @@ GEM
       coderay (~> 1.1)
       method_source (~> 1.0)
     public_suffix (4.0.4)
-    puma (4.3.3)
+    puma (4.3.5)
       nio4r (~> 2.0)
     rack (2.2.2)
     rack-test (1.1.0)