diff --git a/package.json b/package.json
index 48fda90a..5f343cb5 100644
--- a/package.json
+++ b/package.json
@@ -26,46 +26,33 @@
     "@types/console-log-level": "^1.4.0",
     "@types/estree": "0.0.39",
     "@types/extend": "^3.0.0",
-    "@types/glob": "^7.0.0",
     "@types/lodash": "^4.14.69",
     "@types/mkdirp": "^0.5.1",
     "@types/mocha": "^5.0.0",
     "@types/ncp": "^2.0.1",
     "@types/nock": "^9.1.0",
     "@types/node": "~10.10.0",
-    "@types/once": "^1.4.0",
     "@types/p-limit": "^2.0.0",
     "@types/pify": "^3.0.2",
     "@types/proxyquire": "^1.3.28",
     "@types/request": "^2.47.1",
-    "@types/rimraf": "^2.0.2",
     "@types/semver": "^5.3.32",
-    "@types/tmp": "0.0.33",
     "changelog-maker": "^2.2.2",
-    "closure-npc": "*",
     "codecov": "^3.0.4",
-    "coveralls": "^3.0.0",
     "cross-env": "^5.2.0",
-    "glob": "^7.1.2",
     "gts": "^0.9.0",
     "intelli-espower-loader": "^1.0.1",
-    "istanbul": "^0.4.1",
     "js-green-licenses": "^0.5.0",
     "mkdirp": "^0.5.1",
     "mocha": "^5.0.0",
     "ncp": "^2.0.0",
     "nock": "^10.0.0",
     "nyc": "^13.1.0",
-    "once": "^1.4.0",
-    "pify": "^4.0.0",
     "post-install-check": "0.0.1",
     "proxyquire": "^2.0.0",
     "request": "^2.88.0",
     "require-inject": "^1.4.3",
-    "rimraf": "^2.6.2",
     "source-map-support": "^0.5.6",
-    "tmp": "0.0.33",
-    "tslint": "^5.4.3",
     "typescript": "~3.1.0"
   },
   "dependencies": {
@@ -78,11 +65,11 @@
     "gcp-metadata": "^0.9.0",
     "lodash": "^4.12.0",
     "p-limit": "^2.0.0",
+    "pify": "^4.0.1",
     "semver": "^5.5.0",
     "source-map": "^0.6.1",
     "split": "^1.0.0",
-    "teeny-request": "^3.6.0",
-    "util.promisify": "^1.0.0"
+    "teeny-request": "^3.6.0"
   },
   "scripts": {
     "changelog": "npm run compile && ./bin/run-changelog.sh",
diff --git a/src/agent/debuglet.ts b/src/agent/debuglet.ts
index f125deec..5aa70fc9 100644
--- a/src/agent/debuglet.ts
+++ b/src/agent/debuglet.ts
@@ -23,6 +23,7 @@ import * as fs from 'fs';
 import * as metadata from 'gcp-metadata';
 import * as _ from 'lodash';
 import * as path from 'path';
+import * as promisify from 'pify';
 import * as util from 'util';
 
 import {Debug, PackageInfo} from '../client/stackdriver/debug';
@@ -39,8 +40,6 @@ import * as utils from './util/utils';
 import * as debugapi from './v8/debugapi';
 import {DebugApi} from './v8/debugapi';
 
-const promisify = require('util.promisify');
-
 const readFilep = promisify(fs.readFile);
 
 const ALLOW_EXPRESSIONS_MESSAGE = 'Expressions and conditions are not allowed' +
diff --git a/src/agent/io/sourcemapper.ts b/src/agent/io/sourcemapper.ts
index 1a8975dc..7200394f 100644
--- a/src/agent/io/sourcemapper.ts
+++ b/src/agent/io/sourcemapper.ts
@@ -17,12 +17,12 @@
 import * as fs from 'fs';
 import * as _ from 'lodash';
 import * as path from 'path';
+import * as promisify from 'pify';
 import * as sourceMap from 'source-map';
 
 import {findScriptsFuzzy} from '../util/utils';
 
-const promisify = require('util.promisify');
-const pLimit = require('p-limit');
+import pLimit = require('p-limit');
 
 const CONCURRENCY = 10;
 const readFilep = promisify(fs.readFile);