diff --git a/Gemfile.lock b/Gemfile.lock
index f5bc858..3f816bb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -26,7 +26,7 @@ GEM
     pry (0.13.1)
       coderay (~> 1.1)
       method_source (~> 1.0)
-    puma (4.3.5)
+    puma (4.3.8)
       nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)