diff --git a/kubecon-eu-22-demo/rails/app/Gemfile.lock b/kubecon-eu-22-demo/rails/app/Gemfile.lock
index aadd2d4..56d53c7 100644
--- a/kubecon-eu-22-demo/rails/app/Gemfile.lock
+++ b/kubecon-eu-22-demo/rails/app/Gemfile.lock
@@ -95,7 +95,7 @@ GEM
     listen (3.7.1)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
-    loofah (2.17.0)
+    loofah (2.19.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.7.1)
@@ -108,12 +108,14 @@ GEM
     msgpack (1.5.1)
     mysql2 (0.5.3)
     nio4r (2.5.8)
-    nokogiri (1.13.6-x86_64-darwin)
+    nokogiri (1.13.10-x86_64-darwin)
+      racc (~> 1.4)
+    nokogiri (1.13.10-x86_64-linux)
       racc (~> 1.4)
     public_suffix (4.0.7)
     puma (5.6.4)
       nio4r (~> 2.0)
-    racc (1.6.0)
+    racc (1.6.1)
     rack (2.2.3)
     rack-mini-profiler (2.3.4)
       rack (>= 1.2.0)
@@ -208,6 +210,7 @@ GEM
 
 PLATFORMS
   x86_64-darwin-19
+  x86_64-linux
 
 DEPENDENCIES
   bootsnap (>= 1.4.4)