diff --git a/packages/core/package.json b/packages/core/package.json
index d1769a5673..7239bc31b4 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -3,7 +3,6 @@
   "version": "2.2.1",
   "description": "The extendable JavaScript mutation testing framework",
   "main": "src/Stryker.js",
-  "typings": "src/Stryker.d.ts",
   "scripts": {
     "start": "tsc -w",
     "test": "nyc --exclude-after-remap=false --check-coverage --reporter=html --report-dir=reports/coverage --lines 80 --functions 80 --branches 75 npm run mocha",
diff --git a/packages/html-reporter/package.json b/packages/html-reporter/package.json
index b8cb6138a6..b135d9904d 100644
--- a/packages/html-reporter/package.json
+++ b/packages/html-reporter/package.json
@@ -3,7 +3,6 @@
   "version": "2.2.1",
   "description": "An html reporter for the JavaScript mutation testing framework Stryker",
   "main": "src/index.js",
-  "typings": "src/index.d.ts",
   "scripts": {
     "test": "nyc --exclude-after-remap=false --check-coverage --reporter=html --report-dir=reports/coverage --lines 95 --functions 95 --branches 90 npm run mocha",
     "mocha": "mocha \"test/helpers/**/*.js\" \"test/unit/**/*.js\" && mocha --timeout 20000 \"test/helpers/**/*.js\" \"test/integration/**/*.js\""
diff --git a/packages/mutator-specification/package.json b/packages/mutator-specification/package.json
index 78763b92af..ca4b1c8e93 100644
--- a/packages/mutator-specification/package.json
+++ b/packages/mutator-specification/package.json
@@ -13,7 +13,6 @@
     "access": "public"
   },
   "main": "src/index.js",
-  "typings": "src/index.ts",
   "author": "Nico Jansen <jansennico@gmail.com>",
   "repository": {
     "type": "git",
diff --git a/packages/test-helpers/package.json b/packages/test-helpers/package.json
index c63e6103a7..a355e2b66d 100644
--- a/packages/test-helpers/package.json
+++ b/packages/test-helpers/package.json
@@ -4,7 +4,6 @@
   "version": "2.2.1",
   "description": "A helper package for testing",
   "main": "src/index.js",
-  "typings": "src/index.d.ts",
   "scripts": {},
   "repository": {
     "type": "git",
diff --git a/packages/util/package.json b/packages/util/package.json
index 7861df5937..4ad191360a 100644
--- a/packages/util/package.json
+++ b/packages/util/package.json
@@ -3,7 +3,6 @@
   "version": "2.2.1",
   "description": "Contains utilities for Stryker, the mutation testing framework for JavaScript and friends",
   "main": "src/index.js",
-  "typings": "src/index.d.ts",
   "scripts": {
     "start": "tsc -w",
     "test": "nyc --exclude-after-remap=false --check-coverage --reporter=html --report-dir=reports/coverage --lines 90 --functions 95 --branches 75 npm run mocha",
diff --git a/packages/wct-runner/package.json b/packages/wct-runner/package.json
index f3f9135194..0730b3ba4f 100644
--- a/packages/wct-runner/package.json
+++ b/packages/wct-runner/package.json
@@ -3,7 +3,6 @@
   "version": "2.2.1",
   "description": "A plugin to use web component tester as a test runner for Stryker, the mutation testing framework for JavaScript and friends",
   "main": "src/index.js",
-  "typings": "src/index.d.ts",
   "scripts": {
     "start": "tsc -w",
     "test": "cross-env LAUNCHPAD_BROWSERS=chrome nyc --reporter=html --report-dir=reports/coverage --lines 95 --functions 95 --branches 95 npm run mocha",