diff --git a/lib/collection.js b/lib/collection.js
index e5d457c..d26e92d 100644
--- a/lib/collection.js
+++ b/lib/collection.js
@@ -1,6 +1,6 @@
 var assert = require('assert');
 var _ = require('lodash');
-var objectAssignDeep = require('object-assign-deep');
+var objectAssignDeep = require('assign-deep');
 
 var ObjectId = require('bson-objectid');
 var debug = require('debug')('mongo-mock:collection');
diff --git a/package-lock.json b/package-lock.json
index 5d9d2a7..dd2e826 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,6 +4,19 @@
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
+    "assign-deep": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/assign-deep/-/assign-deep-1.0.1.tgz",
+      "integrity": "sha512-CSXAX79mibneEYfqLT5FEmkqR5WXF+xDRjgQQuVf6wSCXCYU8/vHttPidNar7wJ5BFmKAo8Wei0rCtzb+M/yeA==",
+      "requires": {
+        "assign-symbols": "^2.0.2"
+      }
+    },
+    "assign-symbols": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/assign-symbols/-/assign-symbols-2.0.2.tgz",
+      "integrity": "sha512-9sBQUQZMKFKcO/C3Bo6Rx4CQany0R0UeVcefNGRRdW2vbmaMOhV1sbmlXcQLcD56juLXbSGTBm0GGuvmrAF8pA=="
+    },
     "balanced-match": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
@@ -200,11 +213,6 @@
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
       "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g="
     },
-    "object-assign-deep": {
-      "version": "0.4.0",
-      "resolved": "https://registry.npmjs.org/object-assign-deep/-/object-assign-deep-0.4.0.tgz",
-      "integrity": "sha512-54Uvn3s+4A/cMWx9tlRez1qtc7pN7pbQ+Yi7mjLjcBpWLlP+XbSHiHbQW6CElDiV4OvuzqnMrBdkgxI1mT8V/Q=="
-    },
     "once": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
diff --git a/package.json b/package.json
index 4e5d108..5074d6c 100644
--- a/package.json
+++ b/package.json
@@ -21,11 +21,11 @@
   },
   "homepage": "https://github.com/williamkapke/mongo-mock",
   "dependencies": {
+    "assign-deep": "^1.0.1",
     "bson-objectid": "^1.2.5",
     "debug": "^2.6.9",
     "lodash": "^4.17.13",
     "modifyjs": "^0.3.1",
-    "object-assign-deep": "^0.4.0",
     "sift": "^11.1.8"
   },
   "devDependencies": {