diff --git a/index.js b/index.js
index 31113c2..314fa2d 100644
--- a/index.js
+++ b/index.js
@@ -16,6 +16,9 @@
  */
 'use strict';
 
+// See https://github.com/GoogleChromeLabs/preload-webpack-plugin/issues/45
+require('object.values').shim();
+
 const objectAssign = require('object-assign');
 
 const flatten = arr => arr.reduce((prev, curr) => prev.concat(curr), []);
diff --git a/package-lock.json b/package-lock.json
index 34d54c7..e0612ea 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -740,6 +740,15 @@
       "integrity": "sha1-s2nW+128E+7PUk+RsHD+7cNXzzQ=",
       "dev": true
     },
+    "define-properties": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/define-properties/-/define-properties-1.1.2.tgz",
+      "integrity": "sha1-g6c/L+pWmJj7c3GTyPhzyvbUXJQ=",
+      "requires": {
+        "foreach": "2.0.5",
+        "object-keys": "1.0.11"
+      }
+    },
     "del": {
       "version": "2.2.2",
       "resolved": "https://registry.npmjs.org/del/-/del-2.2.2.tgz",
@@ -909,6 +918,28 @@
         "is-arrayish": "0.2.1"
       }
     },
+    "es-abstract": {
+      "version": "1.10.0",
+      "resolved": "https://registry.npmjs.org/es-abstract/-/es-abstract-1.10.0.tgz",
+      "integrity": "sha512-/uh/DhdqIOSkAWifU+8nG78vlQxdLckUdI/sPgy0VhuXi2qJ7T8czBmqIYtLQVpCIFYafChnsRsB5pyb1JdmCQ==",
+      "requires": {
+        "es-to-primitive": "1.1.1",
+        "function-bind": "1.1.1",
+        "has": "1.0.1",
+        "is-callable": "1.1.3",
+        "is-regex": "1.0.4"
+      }
+    },
+    "es-to-primitive": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/es-to-primitive/-/es-to-primitive-1.1.1.tgz",
+      "integrity": "sha1-RTVSSKiJeQNLZ5Lhm7gfK3l13Q0=",
+      "requires": {
+        "is-callable": "1.1.3",
+        "is-date-object": "1.0.1",
+        "is-symbol": "1.0.1"
+      }
+    },
     "es5-ext": {
       "version": "0.10.29",
       "resolved": "https://registry.npmjs.org/es5-ext/-/es5-ext-0.10.29.tgz",
@@ -1259,6 +1290,11 @@
         "for-in": "1.0.2"
       }
     },
+    "foreach": {
+      "version": "2.0.5",
+      "resolved": "https://registry.npmjs.org/foreach/-/foreach-2.0.5.tgz",
+      "integrity": "sha1-C+4AUBiusmDQo6865ljdATbsG5k="
+    },
     "fs.realpath": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
@@ -2164,6 +2200,11 @@
         }
       }
     },
+    "function-bind": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.1.tgz",
+      "integrity": "sha512-yIovAzMX49sF8Yl58fSCWJ5svSLuaibPxXQJFLmBObTuCr0Mf1KiPopGM9NiFjiYBCbfaa2Fh6breQ6ANVTI0A=="
+    },
     "generate-function": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/generate-function/-/generate-function-2.0.0.tgz",
@@ -2250,6 +2291,14 @@
       "integrity": "sha1-Dovf5NHduIVNZOBOp8AOKgJuVlg=",
       "dev": true
     },
+    "has": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/has/-/has-1.0.1.tgz",
+      "integrity": "sha1-hGFzP1OLCDfJNh45qauelwTcLyg=",
+      "requires": {
+        "function-bind": "1.1.1"
+      }
+    },
     "has-ansi": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/has-ansi/-/has-ansi-2.0.0.tgz",
@@ -2502,6 +2551,16 @@
         "builtin-modules": "1.1.1"
       }
     },
+    "is-callable": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/is-callable/-/is-callable-1.1.3.tgz",
+      "integrity": "sha1-hut1OSgF3cM69xySoO7fdO52BLI="
+    },
+    "is-date-object": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/is-date-object/-/is-date-object-1.0.1.tgz",
+      "integrity": "sha1-mqIOtq7rv/d/vTPnTKAbM1gdOhY="
+    },
     "is-dotfile": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/is-dotfile/-/is-dotfile-1.0.3.tgz",
@@ -2610,6 +2669,14 @@
       "integrity": "sha1-V/4cTkhHTt1lsJkR8msc1Ald2oQ=",
       "dev": true
     },
+    "is-regex": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/is-regex/-/is-regex-1.0.4.tgz",
+      "integrity": "sha1-VRdIm1RwkbCTDglWVM7SXul+lJE=",
+      "requires": {
+        "has": "1.0.1"
+      }
+    },
     "is-resolvable": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/is-resolvable/-/is-resolvable-1.0.0.tgz",
@@ -2625,6 +2692,11 @@
       "integrity": "sha1-EtSj3U5o4Lec6428hBc66A2RykQ=",
       "dev": true
     },
+    "is-symbol": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/is-symbol/-/is-symbol-1.0.1.tgz",
+      "integrity": "sha1-PMWfAAJRlLarLjjbrmaJJWtmBXI="
+    },
     "isarray": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz",
@@ -3053,6 +3125,11 @@
       "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",
       "integrity": "sha1-IQmtx5ZYh8/AXLvUQsrIv7s2CGM="
     },
+    "object-keys": {
+      "version": "1.0.11",
+      "resolved": "https://registry.npmjs.org/object-keys/-/object-keys-1.0.11.tgz",
+      "integrity": "sha1-xUYBd4rVYPEULODgG8yotW0TQm0="
+    },
     "object.omit": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/object.omit/-/object.omit-2.0.1.tgz",
@@ -3063,6 +3140,17 @@
         "is-extendable": "0.1.1"
       }
     },
+    "object.values": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/object.values/-/object.values-1.0.4.tgz",
+      "integrity": "sha1-5STaCbT2b/Bd9FdUbscqyZ8TBpo=",
+      "requires": {
+        "define-properties": "1.1.2",
+        "es-abstract": "1.10.0",
+        "function-bind": "1.1.1",
+        "has": "1.0.1"
+      }
+    },
     "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 49af210..5bab19b 100644
--- a/package.json
+++ b/package.json
@@ -41,6 +41,7 @@
     "webpack": "^3.2.0"
   },
   "dependencies": {
-    "object-assign": "^4.1.1"
+    "object-assign": "^4.1.1",
+    "object.values": "^1.0.4"
   }
 }