diff --git a/CS309/assignment2/yarn.lock b/CS309/assignment2/yarn.lock
index c83f098b..13e73acb 100644
--- a/CS309/assignment2/yarn.lock
+++ b/CS309/assignment2/yarn.lock
@@ -1613,7 +1613,7 @@ debug@2.6.9, debug@^2.2.0, debug@^2.3.3, debug@^2.6.6, debug@^2.6.8, debug@^2.6.
   dependencies:
     ms "2.0.0"
 
-debug@^3.0.0, debug@^3.1.0, debug@^3.2.6:
+debug@^3.1.0, debug@^3.2.6:
   version "3.2.6"
   resolved "https://registry.npm.taobao.org/debug/download/debug-3.2.6.tgz#e83d17de16d8a7efb7717edbe5fb10135eee629b"
   integrity sha1-6D0X3hbYp++3cX7b5fsQE17uYps=
@@ -2143,11 +2143,9 @@ flatten@^1.0.2:
   integrity sha1-2uRqnXj74lKSJYzB54CkHZXAN4I=
 
 follow-redirects@^1.0.0:
-  version "1.9.0"
-  resolved "https://registry.npm.taobao.org/follow-redirects/download/follow-redirects-1.9.0.tgz?cache=0&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Ffollow-redirects%2Fdownload%2Ffollow-redirects-1.9.0.tgz#8d5bcdc65b7108fe1508649c79c12d732dcedb4f"
-  integrity sha1-jVvNxltxCP4VCGScecEtcy3O208=
-  dependencies:
-    debug "^3.0.0"
+  version "1.14.8"
+  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.14.8.tgz#016996fb9a11a100566398b1c6839337d7bfa8fc"
+  integrity sha512-1x0S9UVJHsQprFcEC/qnNzBLcIxsjAV905f/UkQxbclCsoTWlacCNOpQa/anodLl2uaEKFhfWOvM2Qg77+15zA==
 
 for-in@^1.0.2:
   version "1.0.2"