diff --git a/package-lock.json b/package-lock.json
index b96b2a2..2312092 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -69,6 +69,19 @@
         "lodash.result": "^3.0.0",
         "lodash.union": "^3.1.0",
         "lodash.uniqueid": "^3.0.0"
+      },
+      "dependencies": {
+        "lodash.union": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/lodash.union/-/lodash.union-3.1.0.tgz",
+          "integrity": "sha1-pKMGb8Fdan+BUczpvf5j3Of1vP8=",
+          "dev": true,
+          "requires": {
+            "lodash._baseflatten": "^3.0.0",
+            "lodash._baseuniq": "^3.0.0",
+            "lodash.restparam": "^3.0.0"
+          }
+        }
       }
     },
     "ampersand-version": {
@@ -713,6 +726,7 @@
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/lodash._baseuniq/-/lodash._baseuniq-3.0.3.tgz",
       "integrity": "sha1-ISP6DbLWnCjVvrHB821hUip0AjQ=",
+      "dev": true,
       "requires": {
         "lodash._baseindexof": "^3.0.0",
         "lodash._cacheindexof": "^3.0.0",
@@ -1056,14 +1070,9 @@
       }
     },
     "lodash.union": {
-      "version": "3.1.0",
-      "resolved": "https://registry.npmjs.org/lodash.union/-/lodash.union-3.1.0.tgz",
-      "integrity": "sha1-pKMGb8Fdan+BUczpvf5j3Of1vP8=",
-      "requires": {
-        "lodash._baseflatten": "^3.0.0",
-        "lodash._baseuniq": "^3.0.0",
-        "lodash.restparam": "^3.0.0"
-      }
+      "version": "4.6.0",
+      "resolved": "https://registry.npmjs.org/lodash.union/-/lodash.union-4.6.0.tgz",
+      "integrity": "sha1-SLtQiECfFvGCFmZkHETdGqrjzYg="
     },
     "lodash.uniqueid": {
       "version": "3.2.0",
diff --git a/package.json b/package.json
index 7cd047e..03d3e8e 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
     "lodash.difference": "^4.5.0",
     "lodash.filter": "^3.1.1",
     "lodash.foreach": "^3.0.3",
-    "lodash.union": "^3.1.0"
+    "lodash.union": "^4.6.0"
   },
   "devDependencies": {
     "ampersand-collection": "^1.4.5",