diff --git a/.travis.yml b/.travis.yml
index 9ffbf028..9b4eac86 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,7 +6,7 @@ before_install:
   - tar -xf factorio.tar.gz
   - npm install -g codecov
 script:
-  - npx lerna bootstrap --no-ci
+  - npx lerna bootstrap --hoist --no-ci
   - node packages/lib/build_mod --source-dir packages/slave/lua/clusterio_lib --output-dir temp/test/sharedMods
   - curl -o temp/test/sharedMods/subspace_storage_1.99.8.zip -L https://github.com/clusterio/factorioClusterioMod/releases/download/1.99.6/subspace_storage_1.99.8.zip
   - npx lerna run build
diff --git a/docs/contributing.md b/docs/contributing.md
index 7b6067dd..7b9677f5 100644
--- a/docs/contributing.md
+++ b/docs/contributing.md
@@ -53,7 +53,7 @@ The project is organized into several packages that are all managed through Lern
 In order to get the development environment up and running you will need to run the following commands:
 
     npm install
-    npx lerna bootstrap
+    npx lerna bootstrap --hoist
 
 This installs dependencies needed by tests and links the packages up so they work from the git work tree.
 
diff --git a/lerna.json b/lerna.json
index fa71e1ce..37e443a1 100644
--- a/lerna.json
+++ b/lerna.json
@@ -1,7 +1,8 @@
 {
   "packages": [
     "packages/*",
-    "plugins/*"
+    "plugins/*",
+    "test"
   ],
   "version": "2.0.0-alpha.5"
 }
diff --git a/package.json b/package.json
index 091a03b4..09e875ae 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "root",
   "private": true,
   "scripts": {
-    "test": "mocha --check-leaks -R spec --recursive test plugins/global_chat/test plugins/research_sync/test plugins/statistics_exporter/test plugins/subspace_storage/test plugins/player_auth/test",
+    "test": "mocha --check-leaks -R spec --exclude \"**/node_modules/**\" --recursive test plugins/global_chat/test plugins/research_sync/test plugins/statistics_exporter/test plugins/subspace_storage/test plugins/player_auth/test",
     "fast-test": "FAST_TEST=y npm test",
     "cover": "nyc npm test",
     "fast-cover": "FAST_TEST=y nyc npm test",
@@ -21,22 +21,10 @@
     "node": ">=10.16 <11 || >= 12"
   },
   "devDependencies": {
-    "@clusterio/ctl": "file:./packages/ctl",
-    "@clusterio/lib": "file:./packages/lib",
-    "@clusterio/master": "file:packages/master",
-    "@clusterio/slave": "file:./packages/slave",
-    "body-parser": "^1.18.2",
-    "eslint": "^7.2.0",
-    "express": "^4.16.2",
-    "fs-extra": "^8.1.0",
-    "jsdoc": "^3.6.3",
-    "jsonwebtoken": "^8.2.1",
-    "jszip": "^3.2.2",
-    "lerna": "^3.22.1",
-    "mocha": "^6.2.0",
-    "node-forge": "^0.10.0",
-    "nyc": "^14.1.1",
-    "phin": "^3.4.1",
-    "webpack": "^5.0.0"
+    "eslint": "^7.25.0",
+    "jsdoc": "^3.6.6",
+    "lerna": "^4.0.0",
+    "mocha": "^8.4.0",
+    "nyc": "^15.1.0"
   }
 }
diff --git a/packages/ctl/package.json b/packages/ctl/package.json
index 8a16d3ee..41e6fd59 100644
--- a/packages/ctl/package.json
+++ b/packages/ctl/package.json
@@ -20,7 +20,6 @@
   "dependencies": {
     "@clusterio/lib": "^2.0.0-alpha.5",
     "as-table": "^1.0.31",
-    "chalk": "^3.0.0",
     "fs-extra": "^8.1.0",
     "phin": "^3.5.1",
     "winston": "^3.3.3",
diff --git a/packages/lib/package.json b/packages/lib/package.json
index 9a939244..3b193537 100644
--- a/packages/lib/package.json
+++ b/packages/lib/package.json
@@ -12,6 +12,7 @@
   },
   "dependencies": {
     "ajv": "^6.12.6",
+    "chalk": "^4.1.0",
     "fs-extra": "^8.1.0",
     "ini": "^1.3.5",
     "isomorphic-ws": "^4.0.1",
diff --git a/packages/master/package.json b/packages/master/package.json
index 1e1e57dd..0ceff75e 100644
--- a/packages/master/package.json
+++ b/packages/master/package.json
@@ -6,7 +6,7 @@
   "version": "2.0.0-alpha.5",
   "main": "master.js",
   "scripts": {
-    "build": "webpack-cli --env.production",
+    "build": "webpack-cli --env production",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "bin": {
@@ -40,7 +40,8 @@
     "react": "^16.13.1",
     "react-dom": "^16.13.1",
     "react-router-dom": "^5.2.0",
-    "webpack-cli": "^3.3.12",
+    "webpack": "^5.36.2",
+    "webpack-cli": "^4.7.0",
     "webpack-dev-middleware": "^4.1.0",
     "webpack-merge": "^5.2.0"
   },
diff --git a/packages/slave/package.json b/packages/slave/package.json
index e19303c4..0ec58391 100644
--- a/packages/slave/package.json
+++ b/packages/slave/package.json
@@ -20,7 +20,7 @@
   "dependencies": {
     "@clusterio/lib": "^2.0.0-alpha.5",
     "fs-extra": "^8.1.0",
-    "phin": "^3.4.1",
+    "phin": "^3.5.1",
     "pidusage": "^2.0.18",
     "set-blocking": "^2.0.0",
     "winston": "^3.3.3",
diff --git a/packages/web_ui/package.json b/packages/web_ui/package.json
index c9649974..f7ca7056 100644
--- a/packages/web_ui/package.json
+++ b/packages/web_ui/package.json
@@ -34,7 +34,8 @@
     "react-dom": "^16.13.1",
     "react-router-dom": "^5.2.0",
     "style-loader": "^2.0.0",
-    "util": "^0.12.3"
+    "util": "^0.12.3",
+    "webpack": "^5.36.2"
   },
   "publishConfig": {
     "access": "public"
diff --git a/plugins/global_chat/package.json b/plugins/global_chat/package.json
index 594fec72..cf128391 100644
--- a/plugins/global_chat/package.json
+++ b/plugins/global_chat/package.json
@@ -7,18 +7,23 @@
   "license": "MIT",
   "repository": "clusterio/factorioClusterio",
   "scripts": {
-    "build": "webpack-cli --env.production",
+    "build": "webpack-cli --env production",
     "test": "echo \"Error: run tests from root\" && exit 1"
   },
   "bugs": {
     "url": "https://github.com/clusterio/factorioClusterio/issues"
   },
+  "engines": {
+    "node": ">=10.16 <11 || >= 12"
+  },
   "peerDependencies": {
     "@clusterio/lib": "^2.0.0-alpha.0"
   },
   "devDependencies": {
+    "@clusterio/lib": "^2.0.0-alpha.5",
     "@clusterio/web_ui": "^2.0.0-alpha.5",
-    "webpack-cli": "^3.3.12",
+    "webpack": "^5.36.2",
+    "webpack-cli": "^4.7.0",
     "webpack-merge": "^5.2.0"
   },
   "publishConfig": {
diff --git a/plugins/player_auth/package.json b/plugins/player_auth/package.json
index a83f8041..8d7a141e 100644
--- a/plugins/player_auth/package.json
+++ b/plugins/player_auth/package.json
@@ -7,12 +7,15 @@
   "license": "MIT",
   "repository": "clusterio/factorioClusterio",
   "scripts": {
-    "build": "webpack-cli --env.production",
+    "build": "webpack-cli --env production",
     "test": "echo \"Error: run tests from root\" && exit 1"
   },
   "bugs": {
     "url": "https://github.com/clusterio/factorioClusterio/issues"
   },
+  "engines": {
+    "node": ">=10.16 <11 || >= 12"
+  },
   "peerDependencies": {
     "@clusterio/lib": "^2.0.0-alpha.0"
   },
@@ -20,12 +23,14 @@
     "jsonwebtoken": "^8.2.1"
   },
   "devDependencies": {
+    "@clusterio/lib": "^2.0.0-alpha.5",
     "@clusterio/web_ui": "^2.0.0-alpha.5",
     "antd": "^4.6.5",
-    "phin": "^3.4.1",
+    "phin": "^3.5.1",
     "react": "^16.13.1",
     "react-dom": "^16.13.1",
-    "webpack-cli": "^3.3.12",
+    "webpack": "^5.36.2",
+    "webpack-cli": "^4.7.0",
     "webpack-merge": "^5.2.0"
   },
   "publishConfig": {
diff --git a/plugins/research_sync/package.json b/plugins/research_sync/package.json
index a672a29a..fbc21d5f 100644
--- a/plugins/research_sync/package.json
+++ b/plugins/research_sync/package.json
@@ -7,12 +7,15 @@
   "license": "MIT",
   "repository": "clusterio/factorioClusterio",
   "scripts": {
-    "build": "webpack-cli --env.production",
+    "build": "webpack-cli --env production",
     "test": "echo \"Error: run tests from root\" && exit 1"
   },
   "bugs": {
     "url": "https://github.com/clusterio/factorioClusterio/issues"
   },
+  "engines": {
+    "node": ">=10.16 <11 || >= 12"
+  },
   "peerDependencies": {
     "@clusterio/lib": "^2.0.0-alpha.0"
   },
@@ -20,8 +23,10 @@
     "fs-extra": "^8.1.0"
   },
   "devDependencies": {
+    "@clusterio/lib": "^2.0.0-alpha.5",
     "@clusterio/web_ui": "^2.0.0-alpha.5",
-    "webpack-cli": "^3.3.12",
+    "webpack": "^5.36.2",
+    "webpack-cli": "^4.7.0",
     "webpack-merge": "^5.2.0"
   },
   "publishConfig": {
diff --git a/plugins/statistics_exporter/package.json b/plugins/statistics_exporter/package.json
index b74fdb36..24b8865a 100644
--- a/plugins/statistics_exporter/package.json
+++ b/plugins/statistics_exporter/package.json
@@ -7,18 +7,23 @@
   "license": "MIT",
   "repository": "clusterio/factorioClusterio",
   "scripts": {
-    "build": "webpack-cli --env.production",
+    "build": "webpack-cli --env production",
     "test": "echo \"Error: run tests from root\" && exit 1"
   },
   "bugs": {
     "url": "https://github.com/clusterio/factorioClusterio/issues"
   },
+  "engines": {
+    "node": ">=10.16 <11 || >= 12"
+  },
   "peerDependencies": {
     "@clusterio/lib": "^2.0.0-alpha.0"
   },
   "devDependencies": {
+    "@clusterio/lib": "^2.0.0-alpha.5",
     "@clusterio/web_ui": "^2.0.0-alpha.5",
-    "webpack-cli": "^3.3.12",
+    "webpack": "^5.36.2",
+    "webpack-cli": "^4.7.0",
     "webpack-merge": "^5.2.0"
   },
   "publishConfig": {
diff --git a/plugins/subspace_storage/package.json b/plugins/subspace_storage/package.json
index f19c62c4..a29c638c 100644
--- a/plugins/subspace_storage/package.json
+++ b/plugins/subspace_storage/package.json
@@ -7,12 +7,15 @@
   "license": "MIT",
   "repository": "clusterio/factorioClusterio",
   "scripts": {
-    "build": "webpack-cli --env.production",
+    "build": "webpack-cli --env production",
     "test": "echo \"Error: run tests from root\" && exit 1"
   },
   "bugs": {
     "url": "https://github.com/clusterio/factorioClusterio/issues"
   },
+  "engines": {
+    "node": ">=10.16 <11 || >= 12"
+  },
   "peerDependencies": {
     "@clusterio/lib": "^2.0.0-alpha.0"
   },
@@ -20,11 +23,13 @@
     "fs-extra": "^8.1.0"
   },
   "devDependencies": {
+    "@clusterio/lib": "^2.0.0-alpha.5",
     "@clusterio/web_ui": "^2.0.0-alpha.5",
     "antd": "^4.6.5",
     "react": "^16.13.1",
     "react-dom": "^16.13.1",
-    "webpack-cli": "^3.3.12",
+    "webpack": "^5.36.2",
+    "webpack-cli": "^4.7.0",
     "webpack-merge": "^5.2.0"
   },
   "publishConfig": {
diff --git a/test/integration/server.js b/test/integration/server.js
index e2796ea8..5d375e38 100644
--- a/test/integration/server.js
+++ b/test/integration/server.js
@@ -6,6 +6,7 @@ const path = require("path");
 
 const libFactorio = require("@clusterio/lib/factorio");
 const libErrors = require("@clusterio/lib/errors");
+const { logger } = require("@clusterio/lib/logging");
 
 const { slowTest } = require("./index");
 
@@ -34,6 +35,15 @@ describe("Integration of lib/factorio/server", function() {
 			await fs.ensureDir(writePath);
 			logFile = fs.createWriteStream(path.join(writePath, "log.txt"), "utf8");
 			server.on("output", function(output) {
+				if (output.source === "stderr") {
+					// Factorio doesn't print on stderr but sometimes on
+					// Travis a BrokenPipeError is printed on stderr after
+					// the server has closed for mysterious reasons.
+					// I have no idea what causes it, but it causes a write
+					// after end error if not handled.
+					logger.error(`Factorio stderr: ${JSON.stringify(output)}`);
+					return;
+				}
 				logFile.write(`${JSON.stringify(output)}\n`);
 			});
 
diff --git a/test/package.json b/test/package.json
new file mode 100644
index 00000000..74e3207b
--- /dev/null
+++ b/test/package.json
@@ -0,0 +1,20 @@
+{
+  "name": "test",
+  "private": true,
+  "engines": {
+    "node": ">=10.16 <11 || >= 12"
+  },
+  "dependencies": {
+    "@clusterio/ctl": "2.0.0-alpha.5",
+    "@clusterio/lib": "2.0.0-alpha.5",
+    "@clusterio/master": "2.0.0-alpha.5",
+    "@clusterio/slave": "2.0.0-alpha.5",
+    "body-parser": "^1.18.2",
+    "express": "^4.16.2",
+    "fs-extra": "^8.1.0",
+    "jsonwebtoken": "^8.2.1",
+    "jszip": "^3.2.2",
+    "node-forge": "^0.10.0",
+    "phin": "^3.5.1"
+  }
+}