diff --git a/Gemfile.lock b/Gemfile.lock
index a7809d0..dee2be7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -207,7 +207,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     public_suffix (4.0.1)
-    puma (4.3.0)
+    puma (4.3.3)
       nio4r (~> 2.0)
     rack (2.0.7)
     rack-proxy (0.6.5)