From dec8a718c2f0cc200740d4fcf06136218b437b4a Mon Sep 17 00:00:00 2001
From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com>
Date: Thu, 2 Apr 2026 19:24:11 +0000
Subject: [PATCH] Bump rack from 3.1.7 to 3.1.21 in
 /flipped-demos/ch03-saas/sinatra

Bumps [rack](https://github.com/rack/rack) from 3.1.7 to 3.1.21.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](https://github.com/rack/rack/compare/v3.1.7...v3.1.21)

---
updated-dependencies:
- dependency-name: rack
  dependency-version: 3.1.21
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
---
 flipped-demos/ch03-saas/sinatra/Gemfile.lock | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/flipped-demos/ch03-saas/sinatra/Gemfile.lock b/flipped-demos/ch03-saas/sinatra/Gemfile.lock
index 6e5c9bb..7dd86f3 100644
--- a/flipped-demos/ch03-saas/sinatra/Gemfile.lock
+++ b/flipped-demos/ch03-saas/sinatra/Gemfile.lock
@@ -2,9 +2,16 @@ GEM
   remote: https://rubygems.org/
   specs:
     base64 (0.2.0)
+    ffi (1.17.4)
+    ffi (1.17.4-x86_64-linux-gnu)
+    listen (3.10.0)
+      logger
+      rb-fsevent (~> 0.10, >= 0.10.3)
+      rb-inotify (~> 0.9, >= 0.9.10)
+    logger (1.7.0)
     mustermann (3.0.3)
       ruby2_keywords (~> 0.0.1)
-    rack (3.1.7)
+    rack (3.1.21)
     rack-protection (4.0.0)
       base64 (>= 0.1.0)
       rack (>= 3.0.0, < 4)
@@ -13,6 +20,11 @@ GEM
     rackup (2.1.0)
       rack (>= 3)
       webrick (~> 1.8)
+    rb-fsevent (0.11.2)
+    rb-inotify (0.11.1)
+      ffi (~> 1.0)
+    rerun (0.14.0)
+      listen (~> 3.0)
     ruby2_keywords (0.0.5)
     sinatra (4.0.0)
       mustermann (~> 3.0)
@@ -27,9 +39,11 @@ GEM
 
 PLATFORMS
   ruby
+  x86_64-linux
 
 DEPENDENCIES
   rackup
+  rerun
   sinatra (~> 4.0)
   sinatra-flash