diff --git a/flipped-demos/ch07-bdd-cucumber/students/Gemfile.lock b/flipped-demos/ch07-bdd-cucumber/students/Gemfile.lock
index 97e81ac..75d354e 100644
--- a/flipped-demos/ch07-bdd-cucumber/students/Gemfile.lock
+++ b/flipped-demos/ch07-bdd-cucumber/students/Gemfile.lock
@@ -36,19 +36,20 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.4.0)
+    addressable (2.8.6)
+      public_suffix (>= 2.0.2, < 6.0)
     arel (6.0.3)
     binding_of_caller (0.7.2)
       debug_inspector (>= 0.0.1)
-    builder (3.2.2)
+    builder (3.2.4)
     byebug (9.0.5)
-    capybara (2.7.1)
+    capybara (2.18.0)
       addressable
-      mime-types (>= 1.16)
+      mini_mime (>= 0.1.3)
       nokogiri (>= 1.3.3)
       rack (>= 1.0.0)
       rack-test (>= 0.5.4)
-      xpath (~> 2.0)
+      xpath (>= 2.0, < 4.0)
     coffee-rails (4.1.1)
       coffee-script (>= 2.2.0)
       railties (>= 4.0.0, < 5.1.x)
@@ -57,6 +58,7 @@ GEM
       execjs
     coffee-script-source (1.10.0)
     concurrent-ruby (1.0.2)
+    crass (1.0.6)
     cucumber (2.4.0)
       builder (>= 2.1.2)
       cucumber-core (~> 1.5.0)
@@ -86,7 +88,8 @@ GEM
       activesupport (>= 4.1.0)
     haml (4.0.7)
       tilt
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jbuilder (2.6.0)
       activesupport (>= 3.0.0, < 5.1)
       multi_json (~> 1.2)
@@ -94,23 +97,26 @@ GEM
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    json (1.8.3)
-    loofah (2.0.3)
-      nokogiri (>= 1.5.9)
+    json (1.8.6)
+    loofah (2.22.0)
+      crass (~> 1.0.2)
+      nokogiri (>= 1.12.0)
     mail (2.6.4)
       mime-types (>= 1.16, < 4)
-    mime-types (3.1)
+    mime-types (3.5.2)
       mime-types-data (~> 3.2015)
-    mime-types-data (3.2016.0521)
-    mini_portile2 (2.1.0)
-    minitest (5.9.0)
+    mime-types-data (3.2023.1205)
+    mini_mime (1.1.5)
+    mini_portile2 (2.8.5)
+    minitest (5.22.0)
     multi_json (1.12.1)
     multi_test (0.1.2)
-    nokogiri (1.6.8)
-      mini_portile2 (~> 2.1.0)
-      pkg-config (~> 1.1.7)
-    pkg-config (1.1.7)
-    rack (1.6.4)
+    nokogiri (1.16.2)
+      mini_portile2 (~> 2.8.2)
+      racc (~> 1.4)
+    public_suffix (5.0.4)
+    racc (1.7.3)
+    rack (1.6.13)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.6)
@@ -124,14 +130,15 @@ GEM
       bundler (>= 1.3.0, < 2.0)
       railties (= 4.2.6)
       sprockets-rails
-    rails-deprecated_sanitizer (1.0.3)
+    rails-deprecated_sanitizer (1.0.4)
       activesupport (>= 4.2.0.alpha)
-    rails-dom-testing (1.0.7)
-      activesupport (>= 4.2.0.beta, < 5.0)
-      nokogiri (~> 1.6.0)
+    rails-dom-testing (1.0.9)
+      activesupport (>= 4.2.0, < 5.0)
+      nokogiri (~> 1.6)
       rails-deprecated_sanitizer (>= 1.0.1)
-    rails-html-sanitizer (1.0.3)
-      loofah (~> 2.0)
+    rails-html-sanitizer (1.6.0)
+      loofah (~> 2.21)
+      nokogiri (~> 1.14)
     railties (4.2.6)
       actionpack (= 4.2.6)
       activesupport (= 4.2.6)
@@ -177,12 +184,12 @@ GEM
       sprockets (>= 3.0.0)
     sqlite3 (1.3.11)
     thor (0.19.1)
-    thread_safe (0.3.5)
+    thread_safe (0.3.6)
     tilt (2.0.5)
     turbolinks (5.0.1)
       turbolinks-source (~> 5)
     turbolinks-source (5.0.0)
-    tzinfo (1.2.2)
+    tzinfo (1.2.11)
       thread_safe (~> 0.1)
     uglifier (3.0.2)
       execjs (>= 0.3.0, < 3)
@@ -191,8 +198,8 @@ GEM
       binding_of_caller (>= 0.7.2)
       railties (>= 4.0)
       sprockets-rails (>= 2.0, < 4.0)
-    xpath (2.0.0)
-      nokogiri (~> 1.3)
+    xpath (3.2.0)
+      nokogiri (~> 1.8)
 
 PLATFORMS
   ruby