diff --git a/package.json b/package.json
index 28f09eb..8bac7b5 100644
--- a/package.json
+++ b/package.json
@@ -50,7 +50,7 @@
     "hull": "0.13.16",
     "jayson": "^2.0.4",
     "json-rpc2": "^1.0.2",
-    "lodash": "^4.17.4",
+    "lodash": "^4.17.21",
     "lru-cache": "^4.1.1",
     "moment": "^2.19.4",
     "newrelic": "^2.4.1",
diff --git a/yarn.lock b/yarn.lock
index d23718f..4ac0f7e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4322,18 +4322,14 @@ lodash@3.x.x:
   version "3.10.1"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-3.10.1.tgz#5bf45e8e49ba4189e17d482789dfd15bd140b7b6"
 
-lodash@^4.0.0, lodash@^4.14.0, lodash@^4.15.0, lodash@^4.17.4, lodash@^4.2.0, lodash@^4.3.0, lodash@^4.8.2, lodash@latest, lodash@~4.17.2:
+lodash@^4.0.0, lodash@^4.14.0, lodash@^4.15.0, lodash@^4.17.10, lodash@^4.17.21, lodash@^4.17.4, lodash@^4.17.5, lodash@^4.2.0, lodash@^4.3.0, lodash@^4.8.2, lodash@~4.17.2:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+
+lodash@latest:
   version "4.17.4"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.4.tgz#78203a4d1c328ae1d86dca6460e369b57f4055ae"
 
-lodash@^4.17.10:
-  version "4.17.10"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.10.tgz#1b7793cf7259ea38fb3661d4d38b3260af8ae4e7"
-
-lodash@^4.17.5:
-  version "4.17.5"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.5.tgz#99a92d65c0272debe8c96b6057bc8fbfa3bed511"
-
 log-symbols@^2.1.0:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/log-symbols/-/log-symbols-2.2.0.tgz#5740e1c5d6f0dfda4ad9323b5332107ef6b4c40a"