diff --git a/Gemfile.lock b/Gemfile.lock
index 7bf442dc..ee515225 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -188,7 +188,7 @@ GEM
     pdfkit (0.8.4.1)
     pg (0.21.0)
     public_suffix (4.0.6)
-    puma (4.3.9)
+    puma (4.3.12)
       nio4r (~> 2.0)
     pundit (2.1.0)
       activesupport (>= 3.0.0)