diff --git a/Gemfile.lock b/Gemfile.lock
index 7d8157708..9e87abfe0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -404,7 +404,7 @@ GEM
     pry-rails (0.3.9)
       pry (>= 0.10.4)
     public_suffix (4.0.1)
-    puma (4.3.1)
+    puma (4.3.3)
       nio4r (~> 2.0)
     raabro (1.1.6)
     rack (2.0.8)