diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 29bf8453fd..5e9c8ac614 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -81,6 +81,13 @@ npm-e2e:
     - yarn
     - yarn test:e2e:npm
 
+check-licenses:
+  stage: test
+  tags: ['runner:main', 'size:large']
+  image: $CI_IMAGE
+  script:
+    - node --no-warnings scripts/check-licenses.js
+
 unit-cbt:
   except:
     refs:
diff --git a/LICENSE-3rdparty.csv b/LICENSE-3rdparty.csv
index 179567e4cd..b20c77b3ec 100644
--- a/LICENSE-3rdparty.csv
+++ b/LICENSE-3rdparty.csv
@@ -5,6 +5,7 @@ require,tslib,Apache-2.0,Copyright Microsoft Corporation
 require,url-polyfill,MIT,Copyright 2017 Valentin Richard
 file,tracekit,MIT,Copyright 2013 Onur Can Cakmak and all TraceKit contributors
 dev,@types/jasmine,MIT,Copyright Microsoft Corporation
+dev,@types/lodash.assign,MIT,Copyright Microsoft Corporation
 dev,@types/lodash.merge,MIT,Copyright Microsoft Corporation
 dev,@types/request,MIT,Copyright Microsoft Corporation
 dev,@types/sinon,MIT,Copyright Microsoft Corporation
@@ -16,6 +17,7 @@ dev,@wdio/selenium-standalone-service,MIT,Copyright JS Foundation and other cont
 dev,@wdio/spec-reporter,MIT,Copyright JS Foundation and other contributors
 dev,@wdio/sync,MIT,Copyright JS Foundation and other contributors
 dev,body-parser,MIT,Copyright 2014 Jonathan Ong 2014-2015 Douglas Christopher Wilson
+dev,codecov,MIT,Copyright 2014 Gregg Caines
 dev,cors,MIT,Copyright 2013 Troy Goode
 dev,express,MIT,Copyright 2009-2014 TJ Holowaychuk 2013-2014 Roman Shtylman 2014-2015 Douglas Christopher Wilson
 dev,istanbul-instrumenter-loader,MIT,Copyright JS Foundation and other contributors
@@ -30,6 +32,7 @@ dev,karma-spec-reporter,MIT,Copyright 2015 Michael Lex
 dev,karma-typescript-preprocessor2,MIT,Copyright 2015 Cleiton Gomes Loiola
 dev,karma-webpack,MIT,Copyright JS Foundation and other contributors
 dev,lerna,MIT,Copyright 2015-present Lerna Contributors
+dev,morgan,MIT,Copyright 2014 Jonathan Ong 2014-2017 Douglas Christopher Wilson
 dev,npm-run-all,MIT,Copyright 2015 Toru Nagashima
 dev,prettier,MIT,Copyright James Long and contributors
 dev,replace-in-file,MIT,Copyright 2015-2019 Adam Reis
diff --git a/scripts/check-licenses.js b/scripts/check-licenses.js
new file mode 100644
index 0000000000..3974ae2aa6
--- /dev/null
+++ b/scripts/check-licenses.js
@@ -0,0 +1,69 @@
+'use strict'
+
+const fs = require('fs')
+const path = require('path')
+const readline = require('readline')
+const util = require('util')
+const exec = util.promisify(require('child_process').exec)
+
+const LICENSE_FILE = 'LICENSE-3rdparty.csv'
+
+async function main() {
+  const packageJsonPaths = await findPackageJsonPaths()
+
+  console.log(`Look for dependencies in:\n`, packageJsonPaths)
+  const declaredDependencies = withoutDuplicates(packageJsonPaths.flatMap(retrievePackageJsonDependencies)).sort()
+
+  const declaredLicenses = (await retrieveLicenses()).sort()
+
+  if (JSON.stringify(declaredDependencies) !== JSON.stringify(declaredLicenses)) {
+    console.error(`\n❌ package.json dependencies and ${LICENSE_FILE} mismatch`)
+    console.error(
+      `\nIn package.json but not in ${LICENSE_FILE}:\n`,
+      declaredDependencies.filter((d) => !declaredLicenses.includes(d))
+    )
+    console.error(
+      `\nIn ${LICENSE_FILE} but not in package.json:\n`,
+      declaredLicenses.filter((d) => !declaredDependencies.includes(d))
+    )
+    throw new Error('dependencies mismatch')
+  }
+  console.log(`\n✅ All dependencies listed in ${LICENSE_FILE}`)
+}
+
+async function findPackageJsonPaths() {
+  const { stdout } = await exec('find . -path "*/node_modules/*" -prune -o -name "package.json" -print')
+  return stdout.trim().split('\n')
+}
+
+function retrievePackageJsonDependencies(packageJsonPath) {
+  const packageJson = require(path.join(__dirname, '..', packageJsonPath))
+
+  return Object.keys(packageJson.dependencies || {})
+    .concat(Object.keys(packageJson.devDependencies || {}))
+    .filter((dependency) => !dependency.includes('@datadog'))
+}
+
+function withoutDuplicates(a) {
+  return [...new Set(a)]
+}
+
+async function retrieveLicenses() {
+  const fileStream = fs.createReadStream(path.join(__dirname, '..', LICENSE_FILE))
+  const rl = readline.createInterface({ input: fileStream })
+  const licenses = []
+  let header = true
+  for await (const line of rl) {
+    const csvColumns = line.split(',')
+    if (!header && csvColumns[0] !== 'file') {
+      licenses.push(csvColumns[1])
+    }
+    header = false
+  }
+  return licenses
+}
+
+main().catch((e) => {
+  console.error('\nStacktrace:\n', e)
+  process.exit(1)
+})