diff --git a/Gemfile.lock b/Gemfile.lock
index 7f6287e5..8a19efe9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -364,7 +364,7 @@ GEM
       method_source (~> 0.8.1)
       slop (~> 3.4)
     public_suffix (3.0.2)
-    puma (3.10.0)
+    puma (3.12.0)
     rack (2.0.5)
     rack-openid (1.3.1)
       rack (>= 1.1.0)