diff --git a/package-lock.json b/package-lock.json
index 0b33eee..b95806f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -21,7 +21,7 @@
         "@iobroker/eslint-config": "^2.2.0",
         "@iobroker/legacy-testing": "^2.0.2",
         "@iobroker/testing": "^5.1.1",
-        "chai": "^4.5.0",
+        "chai": "^6.2.0",
         "mocha": "^11.7.2",
         "mqtt": "^5.14.0"
       },
@@ -1218,6 +1218,25 @@
         "mocha": "^11.0.1"
       }
     },
+    "node_modules/@iobroker/legacy-testing/node_modules/chai": {
+      "version": "4.5.0",
+      "resolved": "https://registry.npmjs.org/chai/-/chai-4.5.0.tgz",
+      "integrity": "sha512-RITGBfijLkBddZvnn8jdqoTypxvqbOLYQkGGxXzeFjVHvudaPw0HNFD9x928/eUwYWd2dPCugVqspGALTZZQKw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "assertion-error": "^1.1.0",
+        "check-error": "^1.0.3",
+        "deep-eql": "^4.1.3",
+        "get-func-name": "^2.0.2",
+        "loupe": "^2.3.6",
+        "pathval": "^1.1.1",
+        "type-detect": "^4.1.0"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
     "node_modules/@iobroker/testing": {
       "version": "5.1.1",
       "resolved": "https://registry.npmjs.org/@iobroker/testing/-/testing-5.1.1.tgz",
@@ -1250,6 +1269,38 @@
         "node": ">=18"
       }
     },
+    "node_modules/@iobroker/testing/node_modules/chai": {
+      "version": "4.5.0",
+      "resolved": "https://registry.npmjs.org/chai/-/chai-4.5.0.tgz",
+      "integrity": "sha512-RITGBfijLkBddZvnn8jdqoTypxvqbOLYQkGGxXzeFjVHvudaPw0HNFD9x928/eUwYWd2dPCugVqspGALTZZQKw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "assertion-error": "^1.1.0",
+        "check-error": "^1.0.3",
+        "deep-eql": "^4.1.3",
+        "get-func-name": "^2.0.2",
+        "loupe": "^2.3.6",
+        "pathval": "^1.1.1",
+        "type-detect": "^4.1.0"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/@iobroker/testing/node_modules/chai-as-promised": {
+      "version": "7.1.2",
+      "resolved": "https://registry.npmjs.org/chai-as-promised/-/chai-as-promised-7.1.2.tgz",
+      "integrity": "sha512-aBDHZxRzYnUYuIAIPBH2s511DjlKPzXNlXSGFC8CwmroWQLfrW0LtE1nK3MAwwNhJPa9raEjNCmRoFpG0Hurdw==",
+      "dev": true,
+      "license": "WTFPL",
+      "dependencies": {
+        "check-error": "^1.0.2"
+      },
+      "peerDependencies": {
+        "chai": ">= 2.1.2 < 6"
+      }
+    },
     "node_modules/@iobroker/testing/node_modules/fs-extra": {
       "version": "11.3.1",
       "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-11.3.1.tgz",
@@ -1265,6 +1316,17 @@
         "node": ">=14.14"
       }
     },
+    "node_modules/@iobroker/testing/node_modules/sinon-chai": {
+      "version": "3.7.0",
+      "resolved": "https://registry.npmjs.org/sinon-chai/-/sinon-chai-3.7.0.tgz",
+      "integrity": "sha512-mf5NURdUaSdnatJx3uhoBOrY9dtL19fiOtAdT1Azxg3+lNJFiuN0uzaU3xX1LeAfL17kHQhTAJgpsfhbMJMY2g==",
+      "dev": true,
+      "license": "(BSD-2-Clause OR WTFPL)",
+      "peerDependencies": {
+        "chai": "^4.0.0",
+        "sinon": ">=4.0.0"
+      }
+    },
     "node_modules/@iobroker/types": {
       "version": "7.0.7",
       "resolved": "https://registry.npmjs.org/@iobroker/types/-/types-7.0.7.tgz",
@@ -2642,35 +2704,13 @@
       "peer": true
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     "node_modules/chai": {
-      "version": "4.5.0",
-      "resolved": "https://registry.npmjs.org/chai/-/chai-4.5.0.tgz",
-      "integrity": "sha512-RITGBfijLkBddZvnn8jdqoTypxvqbOLYQkGGxXzeFjVHvudaPw0HNFD9x928/eUwYWd2dPCugVqspGALTZZQKw==",
+      "version": "6.2.0",
+      "resolved": "https://registry.npmjs.org/chai/-/chai-6.2.0.tgz",
+      "integrity": "sha512-aUTnJc/JipRzJrNADXVvpVqi6CO0dn3nx4EVPxijri+fj3LUUDyZQOgVeW54Ob3Y1Xh9Iz8f+CgaCl8v0mn9bA==",
       "dev": true,
       "license": "MIT",
-      "dependencies": {
-        "assertion-error": "^1.1.0",
-        "check-error": "^1.0.3",
-        "deep-eql": "^4.1.3",
-        "get-func-name": "^2.0.2",
-        "loupe": "^2.3.6",
-        "pathval": "^1.1.1",
-        "type-detect": "^4.1.0"
-      },
       "engines": {
-        "node": ">=4"
-      }
-    },
-    "node_modules/chai-as-promised": {
-      "version": "7.1.2",
-      "resolved": "https://registry.npmjs.org/chai-as-promised/-/chai-as-promised-7.1.2.tgz",
-      "integrity": "sha512-aBDHZxRzYnUYuIAIPBH2s511DjlKPzXNlXSGFC8CwmroWQLfrW0LtE1nK3MAwwNhJPa9raEjNCmRoFpG0Hurdw==",
-      "dev": true,
-      "license": "WTFPL",
-      "dependencies": {
-        "check-error": "^1.0.2"
-      },
-      "peerDependencies": {
-        "chai": ">= 2.1.2 < 6"
+        "node": ">=18"
       }
     },
     "node_modules/chalk": {
@@ -7244,17 +7284,6 @@
         "url": "https://opencollective.com/sinon"
       }
     },
-    "node_modules/sinon-chai": {
-      "version": "3.7.0",
-      "resolved": "https://registry.npmjs.org/sinon-chai/-/sinon-chai-3.7.0.tgz",
-      "integrity": "sha512-mf5NURdUaSdnatJx3uhoBOrY9dtL19fiOtAdT1Azxg3+lNJFiuN0uzaU3xX1LeAfL17kHQhTAJgpsfhbMJMY2g==",
-      "dev": true,
-      "license": "(BSD-2-Clause OR WTFPL)",
-      "peerDependencies": {
-        "chai": "^4.0.0",
-        "sinon": ">=4.0.0"
-      }
-    },
     "node_modules/smart-buffer": {
       "version": "4.2.0",
       "resolved": "https://registry.npmjs.org/smart-buffer/-/smart-buffer-4.2.0.tgz",
diff --git a/package.json b/package.json
index 372a87a..ab79131 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "@iobroker/eslint-config": "^2.2.0",
     "@iobroker/legacy-testing": "^2.0.2",
     "@iobroker/testing": "^5.1.1",
-    "chai": "^4.5.0",
+    "chai": "^6.2.0",
     "mocha": "^11.7.2",
     "mqtt": "^5.14.0"
   },