diff --git a/npm-shrinkwrap.json b/npm-shrinkwrap.json
index caa6c992f..eea319d44 100644
--- a/npm-shrinkwrap.json
+++ b/npm-shrinkwrap.json
@@ -1,107 +1,196 @@
 {
   "name": "sendgrid",
   "version": "0.2.7",
-  "dependencies": {
-    "underscore": {
-      "version": "1.4.4"
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
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+      "dependencies": {
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+        "nodemailer": "*",
+        "step": ">= 0.0.5",
+        "underscore": ">=1.2.4"
+      },
+      "devDependencies": {
+        "chai": ">= 0.1.6",
+        "mocha": ">= 0.9.0",
+        "nock": "~0.16.0",
+        "sinon": "~1.6.0"
+      },
+      "engines": {
+        "node": ">= 0.4.7"
+      }
+    },
+    "node_modules/chai": {
+      "version": "1.5.0",
+      "integrity": "sha512-MmczsQrJwRYBBBhpOvqVMPw27OOjj1Bg0NwT4NzLh5dwdfAQKoFx7NuB7DifbAHqCENncQl7QXu8fPof3am/4Q==",
+      "dev": true,
+      "engines": {
+        "node": ">= 0.4.0"
+      }
     },
-    "nodemailer": {
-      "version": "0.4.1",
+    "node_modules/mime": {
+      "version": "1.2.9",
+      "integrity": "sha512-WiLgbHTIq5AYUvU/Luli4mZ1bUcHpGNHyCsbl+KPMg4zt+XUDpQehWjuBjdLaEvDTinvKj/FgfQt3fPoT7j08g=="
+    },
+    "node_modules/mocha": {
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+      "integrity": "sha512-Jl+ayJV6248+dwVqmWfz46GNv2wUMeKUorcwDaYiGUnCzSXO0cT3sxri3he8YvUHXfwnE9et+sibGOxvded1GQ==",
+      "deprecated": "Mocha v1.x is no longer supported.",
+      "dev": true,
       "dependencies": {
-        "mailcomposer": {
-          "version": "0.1.31",
-          "dependencies": {
-            "mimelib": {
-              "version": "0.2.12",
-              "dependencies": {
-                "encoding": {
-                  "version": "0.1.6",
-                  "dependencies": {
-                    "iconv-lite": {
-                      "version": "0.2.7"
-                    }
-                  }
-                },
-                "addressparser": {
-                  "version": "0.1.3"
-                }
-              }
-            }
-          }
-        },
-        "simplesmtp": {
-          "version": "0.2.4",
-          "dependencies": {
-            "rai": {
-              "version": "0.1.7"
-            },
-            "xoauth2": {
-              "version": "0.1.7"
-            }
-          }
-        }
+        "commander": "0.6.1",
+        "debug": "*",
+        "diff": "1.0.2",
+        "growl": "1.7.x",
+        "jade": "0.26.3",
+        "mkdirp": "0.3.3",
+        "ms": "0.3.0"
+      },
+      "bin": {
+        "_mocha": "bin/_mocha",
+        "mocha": "bin/mocha"
+      },
+      "engines": {
+        "node": ">= 0.4.x"
       }
     },
-    "mime": {
-      "version": "1.2.9"
+    "node_modules/mocha/node_modules/commander": {
+      "version": "0.6.1",
+      "integrity": "sha512-0fLycpl1UMTGX257hRsu/arL/cUbcvQM4zMKwvLvzXtfdezIV4yotPS2dYtknF+NmEfWSoCEF6+hj9XLm/6hEw==",
+      "dev": true,
+      "engines": {
+        "node": ">= 0.4.x"
+      }
     },
-    "step": {
-      "version": "0.0.5"
+    "node_modules/mocha/node_modules/debug": {
+      "version": "0.7.2",
+      "integrity": "sha512-Ch0X6QrHzrNiWwLsBJj9KgXL5IK67pfDyTsXXVPyrdObVyKuj/rPdCtZg761nHZM1GQ7wW/o9cAZf5JeTN/vRg==",
+      "dev": true,
+      "engines": {
+        "node": "*"
+      }
     },
-    "chai": {
-      "version": "1.5.0"
+    "node_modules/mocha/node_modules/diff": {
+      "version": "1.0.2",
+      "integrity": "sha512-BOZXenW4qYFnn8GhH24O4xfjF5CxT01uSYOfF/hGpTGFcs/50zc5nnF1AtV1ePP/ok4hGC9ZENrLtm5jjj16GA==",
+      "dev": true,
+      "engines": {
+        "node": ">=0.3.1"
+      }
     },
-    "nock": {
-      "version": "0.16.0",
+    "node_modules/mocha/node_modules/growl": {
+      "version": "1.7.0",
+      "integrity": "sha512-VWv7s1EI41AG2LiCr7uAuxWikLDN1SQOuEUc37d/P34NAIIYgkvWYngNw0d9d9iCrDFL0SYCE9UQpxhIjjtuLg==",
+      "dev": true
+    },
+    "node_modules/mocha/node_modules/jade": {
+      "version": "0.26.3",
+      "integrity": "sha512-mkk3vzUHFjzKjpCXeu+IjXeZD+QOTjUUdubgmHtHTDwvAO2ZTkMTTVrapts5CWz3JvJryh/4KWZpjeZrCepZ3A==",
+      "deprecated": "Jade has been renamed to pug, please install the latest version of pug instead of jade",
+      "dev": true,
       "dependencies": {
-        "propagate": {
-          "version": "0.2.2"
-        }
+        "commander": "0.6.1",
+        "mkdirp": "0.3.0"
+      },
+      "bin": {
+        "jade": "bin/jade"
       }
     },
-    "mocha": {
-      "version": "1.9.0",
+    "node_modules/mocha/node_modules/jade/node_modules/mkdirp": {
+      "version": "0.3.0",
+      "integrity": "sha512-OHsdUcVAQ6pOtg5JYWpCBo9W/GySVuwvP9hueRMW7UqshC0tbfzLv8wjySTPm3tfUZ/21CE9E1pJagOA91Pxew==",
+      "deprecated": "Legacy versions of mkdirp are no longer supported. Please update to mkdirp 1.x. (Note that the API surface has changed to use Promises in 1.x.)",
+      "dev": true,
+      "engines": {
+        "node": "*"
+      }
+    },
+    "node_modules/mocha/node_modules/mkdirp": {
+      "version": "0.3.3",
+      "integrity": "sha512-Oamd41MnZw/yuxtarGf3MFbHzFqQY4S17DcN+rATh2t5MKuCtG7vVVRG+RUT6g9+hr47DIVucIHGOUlwmJRvDA==",
+      "deprecated": "Legacy versions of mkdirp are no longer supported. Please update to mkdirp 1.x. (Note that the API surface has changed to use Promises in 1.x.)",
+      "dev": true,
+      "engines": {
+        "node": "*"
+      }
+    },
+    "node_modules/mocha/node_modules/ms": {
+      "version": "0.3.0",
+      "integrity": "sha512-25BVmSAdN4KRX7XeI6/gwQ9ewx6t9QB9/8X2fVJUUDpPc03qTRaEPgt5bTMZQ5T2l+XT+haSfqIkysOupDsSVQ==",
+      "dev": true
+    },
+    "node_modules/nock": {
+      "version": "0.16.0",
+      "integrity": "sha512-BUBxMXrj68Sa2NkrJ4A7efVUC05VYzaE3FqkVqQQvgkypVYGia228LVmD4bNyvTvuNAOP5AOsg6u+nkHwrS4XQ==",
+      "dev": true,
+      "engines": [
+        "node >= 0.4.10"
+      ],
       "dependencies": {
-        "commander": {
-          "version": "0.6.1"
-        },
-        "growl": {
-          "version": "1.7.0"
-        },
-        "jade": {
-          "version": "0.26.3",
-          "dependencies": {
-            "mkdirp": {
-              "version": "0.3.0"
-            }
-          }
-        },
-        "diff": {
-          "version": "1.0.2"
-        },
-        "debug": {
-          "version": "0.7.2"
-        },
-        "mkdirp": {
-          "version": "0.3.3"
-        },
-        "ms": {
-          "version": "0.3.0"
-        }
+        "propagate": "0.2.x"
       }
     },
-    "sinon": {
+    "node_modules/nock/node_modules/propagate": {
+      "version": "0.2.2",
+      "integrity": "sha512-VV9njW8p8vgzCOsUrGqsLNrZ/Eua3V2UDz4HPS+yBpVo5M7nmdPRKEkp0baBlyvtCdYdBLfaw3fw5ST/uXS25g==",
+      "dev": true,
+      "engines": [
+        "node >= 0.8.1"
+      ]
+    },
+    "node_modules/nodemailer": {
+      "version": "7.0.9",
+      "resolved": "https://registry.npmjs.org/nodemailer/-/nodemailer-7.0.9.tgz",
+      "integrity": "sha512-9/Qm0qXIByEP8lEV2qOqcAW7bRpL8CR9jcTwk3NBnHJNmP9fIJ86g2fgmIXqHY+nj55ZEMwWqYAT2QTDpRUYiQ==",
+      "license": "MIT-0",
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
+    "node_modules/sinon": {
       "version": "1.6.0",
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+      "deprecated": "16.1.1",
+      "dev": true,
+      "dependencies": {
+        "buster-format": "~0.5"
+      },
+      "engines": {
+        "node": ">=0.1.103"
+      }
+    },
+    "node_modules/sinon/node_modules/buster-format": {
+      "version": "0.5.5",
+      "integrity": "sha512-JwlOvNYE2+l71Lp9JFMGoscJY3T9+qbNkFYUNCFpljFdffQ9yNgelaz9aRcrZ3ht1X4N50O90LUZyLX0UJMqTw==",
+      "dev": true,
       "dependencies": {
-        "buster-format": {
-          "version": "0.5.5",
-          "dependencies": {
-            "buster-core": {
-              "version": "0.6.4"
-            }
-          }
-        }
+        "buster-core": ">=0.6.2"
+      },
+      "engines": {
+        "node": "*"
+      }
+    },
+    "node_modules/sinon/node_modules/buster-format/node_modules/buster-core": {
+      "version": "0.6.4",
+      "integrity": "sha512-WxitPqvzr2J7AA2eLEddv72XYaunQUDI0ICZhd1ucT/HhQI6JqfA7WQtoBoVZSgUn1+7uf9r7Plhh8PdO2+Kjg==",
+      "deprecated": "No longer maintained",
+      "dev": true,
+      "engines": {
+        "node": "*"
       }
+    },
+    "node_modules/step": {
+      "version": "0.0.5",
+      "integrity": "sha512-mptfNgL7J2mE423wOLVg1ui/FFmNoeChcwAyfEpvNJ2pB/nH/aJ9I4da1QoknTmYlMogblVPIshddy0Ij96JsQ==",
+      "engines": {
+        "node": "*"
+      }
+    },
+    "node_modules/underscore": {
+      "version": "1.4.4",
+      "integrity": "sha512-ZqGrAgaqqZM7LGRzNjLnw5elevWb5M8LEoDMadxIW3OWbcv72wMMgKdwOKpd5Fqxe8choLD8HN3iSj3TUh/giQ=="
     }
   }
 }