diff --git a/Bai09-VietUngDungDauTienRoR/app2/Gemfile.lock b/Bai09-VietUngDungDauTienRoR/app2/Gemfile.lock
index 317a9f2..bec3152 100644
--- a/Bai09-VietUngDungDauTienRoR/app2/Gemfile.lock
+++ b/Bai09-VietUngDungDauTienRoR/app2/Gemfile.lock
@@ -42,10 +42,12 @@ GEM
     autoprefixer-rails (6.5.1.1)
       execjs
     bcrypt (3.1.11)
+    bcrypt (3.1.11-x86-mingw32)
     bootstrap-sass (3.3.6)
       autoprefixer-rails (>= 5.2.1)
       sass (>= 3.3.4)
-    builder (3.2.2)
+    builder (3.2.4)
+    byebug (11.1.3)
     coffee-rails (4.2.1)
       coffee-script (>= 2.2.0)
       railties (>= 4.0.0, < 5.2.x)
@@ -53,13 +55,15 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.10.0)
-    concurrent-ruby (1.0.2)
+    concurrent-ruby (1.1.10)
+    crass (1.0.6)
     debug_inspector (0.0.2)
     erubis (2.7.0)
     execjs (2.7.0)
     globalid (0.3.7)
       activesupport (>= 4.1.0)
-    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)
@@ -67,7 +71,8 @@ GEM
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    loofah (2.0.3)
+    loofah (2.19.0)
+      crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.6.4)
       mime-types (>= 1.16, < 4)
@@ -75,14 +80,18 @@ GEM
     mime-types (3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
-    mini_portile2 (2.1.0)
-    minitest (5.9.1)
+    mini_portile2 (2.8.0)
+    minitest (5.16.3)
     multi_json (1.12.1)
     nio4r (1.2.1)
-    nokogiri (1.6.8.1-x86-mingw32)
-      mini_portile2 (~> 2.1.0)
+    nokogiri (1.13.9)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
+    nokogiri (1.13.9-x86-mingw32)
+      racc (~> 1.4)
     puma (3.6.0)
-    rack (2.0.1)
+    racc (1.6.0)
+    rack (2.2.4)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.0.0.1)
@@ -97,11 +106,11 @@ GEM
       bundler (>= 1.3.0, < 2.0)
       railties (= 5.0.0.1)
       sprockets-rails (>= 2.0.0)
-    rails-dom-testing (2.0.1)
-      activesupport (>= 4.2.0, < 6.0)
-      nokogiri (~> 1.6.0)
-    rails-html-sanitizer (1.0.3)
-      loofah (~> 2.0)
+    rails-dom-testing (2.0.3)
+      activesupport (>= 4.2.0)
+      nokogiri (>= 1.6)
+    rails-html-sanitizer (1.4.3)
+      loofah (~> 2.3)
     railties (5.0.0.1)
       actionpack (= 5.0.0.1)
       activesupport (= 5.0.0.1)
@@ -123,14 +132,15 @@ GEM
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
+    sqlite3 (1.3.12)
     sqlite3 (1.3.12-x86-mingw32)
     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 (1.2.10)
       thread_safe (~> 0.1)
     tzinfo-data (1.2016.9)
       tzinfo (>= 1.0.0)
@@ -146,6 +156,7 @@ GEM
     websocket-extensions (0.1.2)
 
 PLATFORMS
+  ruby
   x86-mingw32
 
 DEPENDENCIES