diff --git a/package-lock.json b/package-lock.json
index dc2c433..1a15ba7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -119,9 +119,9 @@
       "integrity": "sha512-Xni35NKzjgMrwevysHTCArtLDpPvye8zV/0E4EyYn43P7/7qvQwPh9BGkHewbMulVntbigmcT7rdX3BNo9wRJg=="
     },
     "underscore": {
-      "version": "1.13.1",
-      "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.13.1.tgz",
-      "integrity": "sha512-hzSoAVtJF+3ZtiFX0VgfFPHEDRm7Y/QPjGyNo4TVdnDTdft3tr8hEkD25a1jC+TjTuE7tkHGKkhwCgs9dgBB2g==",
+      "version": "1.13.4",
+      "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.13.4.tgz",
+      "integrity": "sha512-BQFnUDuAQ4Yf/cYY5LNrK9NCJFKriaRbD9uR1fTeXnBeoa97W0i41qkZfGO9pSo8I5KzjAcSY2XYtdf0oKd7KQ==",
       "dev": true
     },
     "vows": {
diff --git a/package.json b/package.json
index dec1a39..6de1a36 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
   },
   "devDependencies": {
     "vows": "0.8.2",
-    "underscore": "1.13.1"
+    "underscore": "1.13.4"
   },
   "scripts": {
     "test": "./node_modules/vows/bin/vows ./test/test.js"