diff --git a/Gemfile.lock b/Gemfile.lock
index 49a4f3e..ccd1747 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -117,7 +117,7 @@ GEM
       mimemagic (~> 0.3.0)
       terrapin (~> 0.6.0)
     public_suffix (4.0.1)
-    puma (4.3.1)
+    puma (4.3.3)
       nio4r (~> 2.0)
     rack (2.0.8)
     rack-test (1.1.0)