diff --git a/package-lock.json b/package-lock.json
index cea174d..399fafa 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -327,6 +327,11 @@
         "ws": "^6.0.0"
       },
       "dependencies": {
+        "tweetnacl": {
+          "version": "1.0.3",
+          "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-1.0.3.tgz",
+          "integrity": "sha512-6rt+RN7aOi1nGMyC4Xa5DdYiukl2UWCbcJft7YhxReBGQD7OAM8Pbxw6YMo4r2diNEA8FEmu32YOn9rhaiE5yw=="
+        },
         "ws": {
           "version": "6.2.1",
           "resolved": "https://registry.npmjs.org/ws/-/ws-6.2.1.tgz",
@@ -1110,9 +1115,9 @@
       "integrity": "sha1-5z3T17DXxe2G+6xrCufYxqadUPo="
     },
     "underscore": {
-      "version": "1.9.1",
-      "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.9.1.tgz",
-      "integrity": "sha512-5/4etnCkd9c8gwgowi5/om/mYO5ajCaOgdzj/oW+0eQV9WxKBDZw5+ycmKmeaTXjInS/W0BzpGLo2xR2aBwZdg=="
+      "version": "1.13.1",
+      "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.13.1.tgz",
+      "integrity": "sha512-hzSoAVtJF+3ZtiFX0VgfFPHEDRm7Y/QPjGyNo4TVdnDTdft3tr8hEkD25a1jC+TjTuE7tkHGKkhwCgs9dgBB2g=="
     },
     "unique-stream": {
       "version": "2.3.1",