diff --git a/package.json b/package.json
index 97aceab..8ac47da 100644
--- a/package.json
+++ b/package.json
@@ -17,7 +17,7 @@
   "dependencies": {
     "bignumber.js": "^9.0.0",
     "cfx-sig-util": "^2.0.3",
-    "lodash": "^4.17.19",
+    "lodash": "^4.17.21",
     "superagent": "^5.1.0"
   },
   "peerDependencies": {
diff --git a/yarn.lock b/yarn.lock
index fcfe4c0..238ff21 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -356,10 +356,10 @@ keccak@^3.0.0:
     node-addon-api "^2.0.0"
     node-gyp-build "^4.2.0"
 
-lodash@^4.17.19:
-  version "4.17.19"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.19.tgz#e48ddedbe30b3321783c5b4301fbd353bc1e4a4b"
-  integrity sha512-JNvd8XER9GQX0v2qJgsaN/mzFCNA5BRe/j8JN9d+tWyGLSodKQHKFicdwNYzWwI3wjRnaKPsGj1XkBjx/F96DQ==
+lodash@^4.17.21:
+  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"