diff --git a/exercism/typescript/gigasecond/yarn.lock b/exercism/typescript/gigasecond/yarn.lock
index 52a74860..93e163ae 100644
--- a/exercism/typescript/gigasecond/yarn.lock
+++ b/exercism/typescript/gigasecond/yarn.lock
@@ -2555,9 +2555,9 @@ flat-cache@^3.0.4:
     rimraf "^3.0.2"
 
 flatted@^3.2.9:
-  version "3.3.1"
-  resolved "https://registry.npmjs.org/flatted/-/flatted-3.3.1.tgz"
-  integrity sha512-X8cqMLLie7KsNUDSdzeN8FYK9rEt4Dt67OsG/DNGnYTSDBG4uFAJFBnUeiV+zCVAvwFy56IjM9sH51jVaEhNxw==
+  version "3.4.2"
+  resolved "https://registry.yarnpkg.com/flatted/-/flatted-3.4.2.tgz#f5c23c107f0f37de8dbdf24f13722b3b98d52726"
+  integrity sha512-PjDse7RzhcPkIJwy5t7KPWQSZ9cAbzQXcafsetQoD7sOJRQlGikNbx7yZp2OotDnJyrDcbyRq3Ttb18iYOqkxA==
 
 for-each@^0.3.3:
   version "0.3.3"