diff --git a/Gemfile.lock b/Gemfile.lock
index 51cc5e86..27ec514a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -379,7 +379,7 @@ GEM
       slop (~> 3.4)
     public_suffix (3.1.1)
     puma (3.12.6)
-    rack (2.0.8)
+    rack (2.1.4)
     rack-openid (1.3.1)
       rack (>= 1.1.0)
       ruby-openid (>= 2.1.8)