diff --git a/bai17-part2-rails-with-silverspoon/app/Gemfile.lock b/bai17-part2-rails-with-silverspoon/app/Gemfile.lock
index 3d8a95d..1af6631 100644
--- a/bai17-part2-rails-with-silverspoon/app/Gemfile.lock
+++ b/bai17-part2-rails-with-silverspoon/app/Gemfile.lock
@@ -38,8 +38,8 @@ GEM
       i18n (~> 0.7)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     arel (8.0.0)
     bindex (0.5.0)
     builder (3.2.3)
@@ -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)
@@ -83,9 +84,11 @@ GEM
     minitest (5.10.3)
     multi_json (1.12.2)
     nio4r (2.1.0)
+    nokogiri (1.8.1)
+      mini_portile2 (~> 2.3.0)
     nokogiri (1.8.1-x86-mingw32)
       mini_portile2 (~> 2.3.0)
-    public_suffix (3.0.1)
+    public_suffix (5.0.0)
     puma (3.11.0)
     rack (2.0.3)
     rack-test (0.8.2)
@@ -139,6 +142,7 @@ 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 +168,7 @@ GEM
       nokogiri (~> 1.3)
 
 PLATFORMS
+  ruby
   x86-mingw32
 
 DEPENDENCIES