diff --git a/package.json b/package.json
index 6201199..56793eb 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "koa-bodyparser": "^4.2.1",
     "koa-router": "^7.4.0",
     "koa-static": "^5.0.0",
-    "lodash": "^4.17.15",
+    "lodash": "^4.17.21",
     "uuid": "^7.0.2"
   },
   "devDependencies": {
diff --git a/packages/dymon/package.json b/packages/dymon/package.json
index af7b7f7..0e8f192 100644
--- a/packages/dymon/package.json
+++ b/packages/dymon/package.json
@@ -46,6 +46,6 @@
   },
   "dependencies": {
     "hot-shots": "^7.2.0",
-    "lodash": "^4.17.15"
+    "lodash": "^4.17.21"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 10feea7..743604a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3455,10 +3455,10 @@ lodash.union@^4.6.0:
   resolved "https://registry.yarnpkg.com/lodash.union/-/lodash.union-4.6.0.tgz#48bb5088409f16f1821666641c44dd1aaae3cd88"
   integrity sha1-SLtQiECfFvGCFmZkHETdGqrjzYg=
 
-lodash@4.17.x, lodash@^4.17.11, lodash@^4.17.12, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.19, lodash@^4.17.20, lodash@^4.17.4:
-  version "4.17.20"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.20.tgz#b44a9b6297bcb698f1c51a3545a2b3b368d59c52"
-  integrity sha512-PlhdFcillOINfeV7Ni6oF1TAEayyZBoZ8bcshTHqOYJYlrqzRK5hagpagky5o4HfCzzd1TRkXPMFq6cKk9rGmA==
+lodash@4.17.x, lodash@^4.17.11, lodash@^4.17.12, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.19, lodash@^4.17.20, lodash@^4.17.21, lodash@^4.17.4:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
 
 log@^6.0.0:
   version "6.0.0"