diff --git a/assets/hello-world/Gemfile b/assets/hello-world/Gemfile
index e965cf0c..bb6f507d 100644
--- a/assets/hello-world/Gemfile
+++ b/assets/hello-world/Gemfile
@@ -1,3 +1,3 @@
 source "https://rubygems.org"
 
-gem "rack"
+gem "rack", ">= 2.1.4.1"
diff --git a/assets/hello-world/Gemfile.lock b/assets/hello-world/Gemfile.lock
index 4f175ac7..62ca0ef1 100644
--- a/assets/hello-world/Gemfile.lock
+++ b/assets/hello-world/Gemfile.lock
@@ -1,13 +1,13 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    rack (2.1.4)
+    rack (2.2.3.1)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  rack
+  rack (>= 2.1.4.1)
 
 BUNDLED WITH
    2.1.4