diff --git a/package.json b/package.json
index 056e99f..bcb0378 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
   },
   "dependencies": {
     "firebase": "^4.1.2",
-    "lodash": "^4.17.4",
+    "lodash": "^4.17.21",
     "prop-types": "^15.5.10",
     "react": "16.0.0-alpha.12",
     "react-addons-shallow-compare": "^15.4.2",
diff --git a/yarn.lock b/yarn.lock
index fd6b2a7..7d957d6 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3429,9 +3429,9 @@ lodash@^3.5.0:
   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@^4.16.6, lodash@^4.17.4, lodash@^4.2.0, lodash@^4.2.1, lodash@^4.3.0, lodash@^4.6.1:
-  version "4.17.4"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.4.tgz#78203a4d1c328ae1d86dca6460e369b57f4055ae"
+lodash@^4.0.0, lodash@^4.14.0, lodash@^4.16.6, lodash@^4.17.21, lodash@^4.17.4, lodash@^4.2.0, lodash@^4.2.1, lodash@^4.3.0, lodash@^4.6.1:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
 
 longest@^1.0.1:
   version "1.0.1"