diff --git a/package.json b/package.json
index ce8c95f..bc90df4 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "url": "https://github.com/i-am-digital/js-pigpio/issues"
   },
   "devDependencies": {
-    "chai": "3.5.0",
+    "chai": "5.1.2",
     "codecov": "3.6.5",
     "commitizen": "2.10.1",
     "cz-conventional-changelog": "1.2.0",