diff --git a/package.json b/package.json
index 980bb6c..79b57f3 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "babel-core": "^6.26.3",
     "babel-preset-env": "^1.7.0",
     "bpmn-js": "^17.0.0",
-    "chai": "^4.4.0",
+    "chai": "^5.0.0",
     "diagram-js": "^14.0.0",
     "eslint": "^8.56.0",
     "eslint-plugin-bpmn-io": "^1.0.0",
@@ -31,7 +31,7 @@
     "mocha": "^10.2.0",
     "npm-run-all2": "^6.0.0",
     "puppeteer": "^22.0.0",
-    "sinon": "^17.0.1",
+    "sinon": "^18.0.0",
     "sinon-chai": "^3.1.0",
     "webpack": "^5.89.0"
   },