diff --git a/performance_rnn/yarn.lock b/performance_rnn/yarn.lock
index 80841d5..4bd9acb 100644
--- a/performance_rnn/yarn.lock
+++ b/performance_rnn/yarn.lock
@@ -702,9 +702,9 @@ lodash.memoize@~3.0.3:
   integrity sha1-LcvSwofLwKVcxCMovQxzYVDVPj8=
 
 lodash@^4.17.14:
-  version "4.17.19"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.19.tgz#e48ddedbe30b3321783c5b4301fbd353bc1e4a4b"
-  integrity sha512-JNvd8XER9GQX0v2qJgsaN/mzFCNA5BRe/j8JN9d+tWyGLSodKQHKFicdwNYzWwI3wjRnaKPsGj1XkBjx/F96DQ==
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
 
 md5.js@^1.3.4:
   version "1.3.5"