diff --git a/bai17-part2-rails-with-silverspoon/app/Gemfile.lock b/bai17-part2-rails-with-silverspoon/app/Gemfile.lock
index 3d8a95d..4e60405 100644
--- a/bai17-part2-rails-with-silverspoon/app/Gemfile.lock
+++ b/bai17-part2-rails-with-silverspoon/app/Gemfile.lock
@@ -64,6 +64,7 @@ GEM
     crass (1.0.3)
     erubi (1.7.0)
     execjs (2.7.0)
+    ffi (1.9.18)
     ffi (1.9.18-x86-mingw32)
     globalid (0.4.1)
       activesupport (>= 4.2.0)
@@ -79,14 +80,18 @@ GEM
       mini_mime (>= 0.1.1)
     method_source (0.9.0)
     mini_mime (1.0.0)
-    mini_portile2 (2.3.0)
+    mini_portile2 (2.8.0)
     minitest (5.10.3)
     multi_json (1.12.2)
     nio4r (2.1.0)
-    nokogiri (1.8.1-x86-mingw32)
-      mini_portile2 (~> 2.3.0)
+    nokogiri (1.13.6)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
+    nokogiri (1.13.6-x86-mingw32)
+      racc (~> 1.4)
     public_suffix (3.0.1)
     puma (3.11.0)
+    racc (1.6.0)
     rack (2.0.3)
     rack-test (0.8.2)
       rack (>= 1.0, < 3)
@@ -139,6 +144,7 @@ GEM
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
+    sqlite3 (1.3.13)
     sqlite3 (1.3.13-x86-mingw32)
     thor (0.20.0)
     thread_safe (0.3.6)
@@ -164,6 +170,7 @@ GEM
       nokogiri (~> 1.3)
 
 PLATFORMS
+  ruby
   x86-mingw32
 
 DEPENDENCIES