diff --git a/package.json b/package.json
index 540c464c32..6ed9eea45f 100644
--- a/package.json
+++ b/package.json
@@ -75,30 +75,30 @@
   },
   "homepage": "https://github.com/developit/preact",
   "devDependencies": {
-    "@types/chai": "^4.1.2",
-    "@types/mocha": "^5.0.0",
-    "@types/node": "^9.4.7",
+    "@types/chai": "^4.1.7",
+    "@types/mocha": "^5.2.5",
+    "@types/node": "^9.6.40",
     "babel-cli": "^6.24.1",
     "babel-core": "^6.24.1",
-    "babel-eslint": "^8.2.2",
+    "babel-eslint": "^8.2.6",
     "babel-loader": "^7.0.0",
     "babel-plugin-transform-object-rest-spread": "^6.23.0",
     "babel-plugin-transform-react-jsx": "^6.24.1",
     "babel-preset-env": "^1.6.1",
     "bundlesize": "^0.17.0",
-    "chai": "^4.1.2",
-    "copyfiles": "^2.0.0",
-    "core-js": "^2.4.1",
+    "chai": "^4.2.0",
+    "copyfiles": "^2.1.0",
+    "core-js": "^2.6.0",
     "coveralls": "^3.0.0",
     "cross-env": "^5.1.4",
     "diff": "^3.0.0",
     "eslint": "^4.18.2",
-    "eslint-plugin-react": "^7.7.0",
+    "eslint-plugin-react": "^7.11.1",
     "flow-bin": "^0.67.1",
     "gzip-size-cli": "^2.0.0",
     "istanbul-instrumenter-loader": "^3.0.0",
     "jscodeshift": "^0.5.0",
-    "karma": "^2.0.0",
+    "karma": "^2.0.5",
     "karma-babel-preprocessor": "^7.0.0",
     "karma-chai-sinon": "^0.1.5",
     "karma-chrome-launcher": "^2.0.0",
@@ -109,20 +109,20 @@
     "karma-sinon": "^1.0.5",
     "karma-source-map-support": "^1.2.0",
     "karma-sourcemap-loader": "^0.3.6",
-    "karma-webpack": "^3.0.0",
+    "karma-webpack": "^3.0.5",
     "mocha": "^5.0.4",
-    "npm-run-all": "^4.0.0",
-    "puppeteer": "^1.5.0",
+    "npm-run-all": "^4.1.5",
+    "puppeteer": "^1.11.0",
     "rimraf": "^2.5.3",
     "rollup": "^0.57.1",
     "rollup-plugin-babel": "^3.0.2",
     "rollup-plugin-memory": "^3.0.0",
-    "rollup-plugin-node-resolve": "^3.0.0",
+    "rollup-plugin-node-resolve": "^3.4.0",
     "sinon": "^4.4.2",
-    "sinon-chai": "^3.0.0",
+    "sinon-chai": "^3.3.0",
     "typescript": "^3.0.1",
     "uglify-js": "^2.7.5",
-    "webpack": "^4.3.0"
+    "webpack": "^4.27.1"
   },
   "greenkeeper": {
     "ignore": [