diff --git a/package.json b/package.json
index f38813a..bc0005d 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "block_io": "2.0.0",
     "bottender": "0.14.34",
     "dotenv": "6.2.0",
-    "lodash": "4.17.13",
+    "lodash": "4.17.21",
     "messaging-api-slack": "0.7.11",
     "ngrok": "3.1.1"
   },
diff --git a/yarn.lock b/yarn.lock
index b88bdd4..1dbabe9 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2879,10 +2879,10 @@ lodash.values@^4.3.0:
   version "4.3.0"
   resolved "https://registry.yarnpkg.com/lodash.values/-/lodash.values-4.3.0.tgz#a3a6c2b0ebecc5c2cba1c17e6e620fe81b53d347"
 
-lodash@4.17.13, lodash@^4.13.1, lodash@^4.14.0, lodash@^4.17.4, lodash@^4.17.5, lodash@^4.2.1, lodash@^4.3.0:
-  version "4.17.13"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.13.tgz#0bdc3a6adc873d2f4e0c4bac285df91b64fc7b93"
-  integrity sha512-vm3/XWXfWtRua0FkUyEHBZy8kCPjErNBT9fJx8Zvs+U6zjqPbTUOpkaoum3O5uiA8sm+yNMHXfYkTUHFoMxFNA==
+lodash@4.17.21, lodash@^4.13.1, lodash@^4.14.0, lodash@^4.17.4, lodash@^4.17.5, lodash@^4.2.1, lodash@^4.3.0:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
 
 lodash@^3.10.1:
   version "3.10.1"