diff --git a/share/containers/rails/app/Gemfile.lock b/share/containers/rails/app/Gemfile.lock
index 66f2fc8..a3d8509 100644
--- a/share/containers/rails/app/Gemfile.lock
+++ b/share/containers/rails/app/Gemfile.lock
@@ -107,7 +107,7 @@ GEM
     nokogiri (1.10.0)
     public_suffix (3.0.3)
     puma (3.12.0)
-    rack (2.0.6)
+    rack (2.2.3)
     rack-test (0.7.0)
       rack (>= 1.0, < 3)
     rails (5.2.2.1)