diff --git a/package.json b/package.json
index 15f393a..0a041bb 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
   },
   "dependencies": {
     "chalk": "^1.1.0",
-    "lodash": "^3.10.0"
+    "lodash": "^4.17.21"
   },
   "devDependencies": {
     "chai": "^3.2.0",
diff --git a/yarn.lock b/yarn.lock
index 578e8ae..9b0a2b1 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -106,9 +106,9 @@ jade@0.26.3:
     commander "0.6.1"
     mkdirp "0.3.0"
 
-lodash@^3.10.0:
-  version "3.10.1"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-3.10.1.tgz#5bf45e8e49ba4189e17d482789dfd15bd140b7b6"
+lodash@^4.17.21:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
 
 lolex@1.3.2:
   version "1.3.2"