diff --git a/package.json b/package.json
index db30b214..5b51bd70 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,7 @@
     "prepare": "lerna run prepare",
     "clean": "lerna run clean",
     "build": "lerna run build",
+    "watch": "concurrently -n sprotty,elk,protocol,generator -c blue,green,yellow,white \"yarn --cwd packages/sprotty watch \" \"yarn --cwd packages/sprotty-elk watch \" \"yarn --cwd packages/sprotty-protocol watch \" \"yarn --cwd packages/generator-sprotty watch \"",
     "test": "lerna run test",
     "publish:prepare": "lerna version --ignore-scripts --yes --no-push",
     "publish:latest": "lerna publish from-git --yes --no-push",
@@ -12,6 +13,7 @@
   "devDependencies": {
     "@typescript-eslint/eslint-plugin": "^6.7.3",
     "@typescript-eslint/parser": "^6.7.3",
+    "concurrently": "~8.2.1",
     "eslint": "^8.50.0",
     "eslint-config-prettier": "^9.0.0",
     "eslint-plugin-header": "^3.1.1",
diff --git a/yarn.lock b/yarn.lock
index e9ac45fa..0f857509 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -29,6 +29,13 @@
     chalk "^2.4.2"
     js-tokens "^4.0.0"
 
+"@babel/runtime@^7.21.0":
+  version "7.23.2"
+  resolved "https://registry.yarnpkg.com/@babel/runtime/-/runtime-7.23.2.tgz#062b0ac103261d68a966c4c7baf2ae3e62ec3885"
+  integrity sha512-mM8eg4yl5D6i3lu2QKPuPH4FArvJ8KhTofbE7jwMUv9KX5mBvwPAqnV3MlyBNqdp9RyRKP6Yck8TrfYrPvX3bg==
+  dependencies:
+    regenerator-runtime "^0.14.0"
+
 "@discoveryjs/json-ext@^0.5.0":
   version "0.5.7"
   resolved "https://registry.yarnpkg.com/@discoveryjs/json-ext/-/json-ext-0.5.7.tgz#1d572bfbbe14b7704e0ba0f39b74815b84870d70"
@@ -1920,6 +1927,21 @@ concat-stream@^2.0.0:
     readable-stream "^3.0.2"
     typedarray "^0.0.6"
 
+concurrently@~8.2.1:
+  version "8.2.2"
+  resolved "https://registry.yarnpkg.com/concurrently/-/concurrently-8.2.2.tgz#353141985c198cfa5e4a3ef90082c336b5851784"
+  integrity sha512-1dP4gpXFhei8IOtlXRE/T/4H88ElHgTiUzh71YUmtjTEHMSRS2Z/fgOxHSxxusGHogsRfxNq1vyAwxSC+EVyDg==
+  dependencies:
+    chalk "^4.1.2"
+    date-fns "^2.30.0"
+    lodash "^4.17.21"
+    rxjs "^7.8.1"
+    shell-quote "^1.8.1"
+    spawn-command "0.0.2"
+    supports-color "^8.1.1"
+    tree-kill "^1.2.2"
+    yargs "^17.7.2"
+
 console-control-strings@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/console-control-strings/-/console-control-strings-1.1.0.tgz#3d7cf4464db6446ea644bf4b39507f9851008e8e"
@@ -2084,6 +2106,13 @@ data-urls@^4.0.0:
     whatwg-mimetype "^3.0.0"
     whatwg-url "^12.0.0"
 
+date-fns@^2.30.0:
+  version "2.30.0"
+  resolved "https://registry.yarnpkg.com/date-fns/-/date-fns-2.30.0.tgz#f367e644839ff57894ec6ac480de40cae4b0f4d0"
+  integrity sha512-fnULvOpxnC5/Vg3NCiWelDsLiUc9bRwAPs/+LfTLNvetFCtCTN+yQz15C/fs4AwX1R9K5GLtLfn8QW+dWisaAw==
+  dependencies:
+    "@babel/runtime" "^7.21.0"
+
 dateformat@^3.0.3:
   version "3.0.3"
   resolved "https://registry.yarnpkg.com/dateformat/-/dateformat-3.0.3.tgz#a6e37499a4d9a9cf85ef5872044d62901c9889ae"
@@ -5215,6 +5244,11 @@ reflect-metadata@^0.1.13:
   resolved "https://registry.yarnpkg.com/reflect-metadata/-/reflect-metadata-0.1.13.tgz#67ae3ca57c972a2aa1642b10fe363fe32d49dc08"
   integrity sha512-Ts1Y/anZELhSsjMcU605fU9RE4Oi3p5ORujwbIKXfWa+0Zxs510Qrmrce5/Jowq3cHSZSJqBjypxmHarc+vEWg==
 
+regenerator-runtime@^0.14.0:
+  version "0.14.0"
+  resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.14.0.tgz#5e19d68eb12d486f797e15a3c6a918f7cec5eb45"
+  integrity sha512-srw17NI0TUWHuGa5CFGGmhfNIeja30WMBfbslPNhf6JrqQlLN5gcrvig1oqPxiVaXb0oW0XRKtH6Nngs5lKCIA==
+
 require-directory@^2.1.1:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/require-directory/-/require-directory-2.1.1.tgz#8c64ad5fd30dab1c976e2344ffe7f792a6a6df42"
@@ -5314,7 +5348,7 @@ rxjs@^6.4.0:
   dependencies:
     tslib "^1.9.0"
 
-rxjs@^7.2.0, rxjs@^7.5.5:
+rxjs@^7.2.0, rxjs@^7.5.5, rxjs@^7.8.1:
   version "7.8.1"
   resolved "https://registry.yarnpkg.com/rxjs/-/rxjs-7.8.1.tgz#6f6f3d99ea8044291efd92e7c7fcf562c4057543"
   integrity sha512-AA3TVj+0A2iuIoQkWEK/tqFjBq2j+6PO6Y0zJcvzLAFhEFIO3HL0vls9hWLncZbAAbK0mar7oZ4V079I/qPMxg==
@@ -5443,6 +5477,11 @@ shebang-regex@^3.0.0:
   resolved "https://registry.yarnpkg.com/shebang-regex/-/shebang-regex-3.0.0.tgz#ae16f1644d873ecad843b0307b143362d4c42172"
   integrity sha512-7++dFhtcx3353uBaq8DDR4NuxBetBzC7ZQOhmTQInHEd6bSrXdiEyzCvG07Z44UYdLShWUyXt5M/yhz8ekcb1A==
 
+shell-quote@^1.8.1:
+  version "1.8.1"
+  resolved "https://registry.yarnpkg.com/shell-quote/-/shell-quote-1.8.1.tgz#6dbf4db75515ad5bac63b4f1894c3a154c766680"
+  integrity sha512-6j1W9l1iAs/4xYBI1SYOVZyFcCis9b4KCLQ8fgAGG07QvzaRLVVRQvAy85yNmmZSjYjg4MWh4gNvlPujU/5LpA==
+
 shelljs@^0.8.5:
   version "0.8.5"
   resolved "https://registry.yarnpkg.com/shelljs/-/shelljs-0.8.5.tgz#de055408d8361bed66c669d2f000538ced8ee20c"
@@ -5580,6 +5619,11 @@ source-map@^0.6.0, source-map@^0.6.1:
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
   integrity sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==
 
+spawn-command@0.0.2:
+  version "0.0.2"
+  resolved "https://registry.yarnpkg.com/spawn-command/-/spawn-command-0.0.2.tgz#9544e1a43ca045f8531aac1a48cb29bdae62338e"
+  integrity sha512-zC8zGoGkmc8J9ndvml8Xksr1Amk9qBujgbF0JAIWO7kXr43w0h/0GJNM/Vustixu+YE8N/MTrQ7N31FvHUACxQ==
+
 spdx-correct@^3.0.0:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/spdx-correct/-/spdx-correct-3.2.0.tgz#4f5ab0668f0059e34f9c00dce331784a12de4e9c"
@@ -5731,7 +5775,7 @@ style-loader@^3.3.3:
   resolved "https://registry.yarnpkg.com/style-loader/-/style-loader-3.3.3.tgz#bba8daac19930169c0c9c96706749a597ae3acff"
   integrity sha512-53BiGLXAcll9maCYtZi2RCQZKa8NQQai5C4horqKyRmHj9H7QmcUyucrH+4KW/gBQbXM2AsB0axoEcFZPlfPcw==
 
-supports-color@8.1.1, supports-color@^8.0.0:
+supports-color@8.1.1, supports-color@^8.0.0, supports-color@^8.1.1:
   version "8.1.1"
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-8.1.1.tgz#cd6fc17e28500cff56c1b86c0a7fd4a54a73005c"
   integrity sha512-MpUEN2OodtUzxvKQl72cUF7RQ5EiHsGvSsVG0ia9c5RbWGL2CI4C7EpPS8UTBIplnlzZiNuV56w+FuNxy3ty2Q==
@@ -5914,6 +5958,11 @@ tr46@~0.0.3:
   resolved "https://registry.yarnpkg.com/tr46/-/tr46-0.0.3.tgz#8184fd347dac9cdc185992f3a6622e14b9d9ab6a"
   integrity sha512-N3WMsuqV66lT30CrXNbEjx4GEwlow3v6rr4mCcv6prnfwhS01rkgyFdjPNBYd9br7LpXV1+Emh01fHnq2Gdgrw==
 
+tree-kill@^1.2.2:
+  version "1.2.2"
+  resolved "https://registry.yarnpkg.com/tree-kill/-/tree-kill-1.2.2.tgz#4ca09a9092c88b73a7cdc5e8a01b507b0790a0cc"
+  integrity sha512-L0Orpi8qGpRG//Nd+H90vFB+3iHnue1zSSGmNOOCh1GLJ7rUKVwV2HvijphGQS2UmhUZewS9VgvxYIdgr+fG1A==
+
 trim-newlines@^3.0.0:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/trim-newlines/-/trim-newlines-3.0.1.tgz#260a5d962d8b752425b32f3a7db0dcacd176c144"
@@ -6465,7 +6514,7 @@ yargs@16.2.0, yargs@^16.2.0:
     y18n "^5.0.5"
     yargs-parser "^20.2.2"
 
-yargs@^17.6.2:
+yargs@^17.6.2, yargs@^17.7.2:
   version "17.7.2"
   resolved "https://registry.yarnpkg.com/yargs/-/yargs-17.7.2.tgz#991df39aca675a192b816e1e0363f9d75d2aa269"
   integrity sha512-7dSzzRQ++CKnNI/krKnYRV7JKKPUXMEh61soaHKg9mrWEhzFWhFnxPxGl+69cD1Ou63C13NUPCnmIcrvqCuM6w==