diff --git a/demo/Gemfile.lock b/demo/Gemfile.lock
index 0688697..09f9d93 100644
--- a/demo/Gemfile.lock
+++ b/demo/Gemfile.lock
@@ -104,13 +104,14 @@ GEM
       mini_mime (>= 0.1.1)
     method_source (1.0.0)
     mini_mime (1.0.2)
-    mini_portile2 (2.4.0)
+    mini_portile2 (2.8.0)
     minitest (5.14.0)
     multi_json (1.14.1)
     nenv (0.3.0)
     nio4r (2.5.2)
-    nokogiri (1.10.9)
-      mini_portile2 (~> 2.4.0)
+    nokogiri (1.13.4)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
     notiffany (0.1.3)
       nenv (~> 0.1)
       shellany (~> 0.0)
@@ -118,6 +119,7 @@ GEM
       coderay (~> 1.1)
       method_source (~> 1.0)
     puma (3.12.4)
+    racc (1.6.0)
     rack (2.2.2)
     rack-test (0.6.3)
       rack (>= 1.0)