diff --git a/code/course3/week4/graded-assignment/todolist/Gemfile.lock b/code/course3/week4/graded-assignment/todolist/Gemfile.lock
index 3e331b4..942c243 100644
--- a/code/course3/week4/graded-assignment/todolist/Gemfile.lock
+++ b/code/course3/week4/graded-assignment/todolist/Gemfile.lock
@@ -55,11 +55,12 @@ GEM
       execjs
     coffee-script-source (1.12.2)
     concurrent-ruby (1.1.5)
-    crass (1.0.4)
+    crass (1.0.5)
     debug_inspector (0.0.3)
     diff-lcs (1.3)
     erubis (2.7.0)
     execjs (2.7.0)
+    ffi (1.11.1)
     ffi (1.11.1-x86-mingw32)
     globalid (0.4.2)
       activesupport (>= 4.2.0)
@@ -72,7 +73,8 @@ GEM
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
     json (1.8.6)
-    loofah (2.2.3)
+    libv8 (3.16.14.19)
+    loofah (2.3.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.7.1)
@@ -83,7 +85,9 @@ GEM
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
     minitest (5.11.3)
-    nokogiri (1.10.4-x86-mingw32)
+    nokogiri (1.10.5)
+      mini_portile2 (~> 2.4.0)
+    nokogiri (1.10.5-x86-mingw32)
       mini_portile2 (~> 2.4.0)
     rack (1.6.11)
     rack-test (0.6.3)
@@ -117,6 +121,7 @@ GEM
     rb-inotify (0.10.0)
       ffi (~> 1.0)
     rdoc (4.3.0)
+    ref (2.0.0)
     rspec-core (3.8.2)
       rspec-support (~> 3.8.0)
     rspec-expectations (3.8.4)
@@ -157,7 +162,11 @@ GEM
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
+    sqlite3 (1.3.13)
     sqlite3 (1.3.13-x86-mingw32)
+    therubyracer (0.12.3)
+      libv8 (~> 3.16.14.15)
+      ref
     thor (0.20.3)
     thread_safe (0.3.6)
     tilt (2.0.9)
@@ -180,6 +189,7 @@ GEM
       nokogiri (~> 1.3)
 
 PLATFORMS
+  ruby
   x86-mingw32
 
 DEPENDENCIES