diff --git a/package-lock.json b/package-lock.json
index 48f68758..71b5faff 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -21,7 +21,7 @@
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         "@stryker-mutator/mocha-runner": "7.1.1",
         "allcombinations": "^1.1.5",
-        "chai": "^4.2.0",
+        "chai": "^5.0.0",
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@@ -1434,12 +1434,12 @@
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+      "resolved": "https://registry.npmjs.org/assertion-error/-/assertion-error-2.0.1.tgz",
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       "dev": true,
       "engines": {
-        "node": "*"
+        "node": ">=12"
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     "node_modules/assertion-error-formatter": {
@@ -1776,21 +1776,19 @@
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-      "resolved": "https://registry.npmjs.org/chai/-/chai-4.4.1.tgz",
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+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/chai/-/chai-5.0.0.tgz",
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       "dev": true,
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-        "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": "^4.0.8"
+        "assertion-error": "^2.0.1",
+        "check-error": "^2.0.0",
+        "deep-eql": "^5.0.1",
+        "loupe": "^3.0.0",
+        "pathval": "^2.0.0"
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-        "node": ">=4"
+        "node": ">=12"
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     "node_modules/chalk": {
@@ -1812,15 +1810,12 @@
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-      "resolved": "https://registry.npmjs.org/check-error/-/check-error-1.0.3.tgz",
-      "integrity": "sha512-iKEoDYaRmd1mxM90a2OEfWhjsjPpYPuQ+lMYsoxB126+t8fw7ySEO48nmDg5COTjxDI65/Y2OWpeEHk3ZOe8zg==",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/check-error/-/check-error-2.0.0.tgz",
+      "integrity": "sha512-tjLAOBHKVxtPoHe/SA7kNOMvhCRdCJ3vETdeY0RuAc9popf+hyaSV6ZEg9hr4cpWF7jmo/JSWEnLDrnijS9Tog==",
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-      "dependencies": {
-        "get-func-name": "^2.0.2"
-      },
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-        "node": "*"
+        "node": ">= 16"
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     "node_modules/chokidar": {
@@ -2216,13 +2211,10 @@
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-      "resolved": "https://registry.npmjs.org/deep-eql/-/deep-eql-4.1.3.tgz",
-      "integrity": "sha512-WaEtAOpRA1MQ0eohqZjpGD8zdI0Ovsm8mmFhaDN8dvDZzyoUMcYDnf5Y6iu7HTXxf8JDS23qWa4a+hKCDyOPzw==",
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/deep-eql/-/deep-eql-5.0.1.tgz",
+      "integrity": "sha512-nwQCf6ne2gez3o1MxWifqkciwt0zhl0LO1/UwVu4uMBuPmflWM4oQ70XMqHqnBJA+nhzncaqL9HVL6KkHJ28lw==",
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-      },
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@@ -4053,12 +4045,12 @@
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-      "resolved": "https://registry.npmjs.org/loupe/-/loupe-2.3.6.tgz",
-      "integrity": "sha512-RaPMZKiMy8/JruncMU5Bt6na1eftNoo++R4Y+N2FrxkDVTrGvcyzFTsaGif4QTeKESheMGegbhw6iUAq+5A8zA==",
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/loupe/-/loupe-3.1.0.tgz",
+      "integrity": "sha512-qKl+FrLXUhFuHUoDJG7f8P8gEMHq9NFS0c6ghXG1J0rldmZFQZoNVv/vyirE9qwCIhWZDsvEFd1sbFu3GvRQFg==",
       "dev": true,
       "dependencies": {
-        "get-func-name": "^2.0.0"
+        "get-func-name": "^2.0.1"
       }
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     "node_modules/lower-case": {
@@ -4744,12 +4736,12 @@
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     },
     "node_modules/pathval": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/pathval/-/pathval-1.1.1.tgz",
-      "integrity": "sha512-Dp6zGqpTdETdR63lehJYPeIOqpiNBNtc7BpWSLrOje7UaIsE5aY92r/AunQA7rsXvet3lrJ3JnZX29UPTKXyKQ==",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/pathval/-/pathval-2.0.0.tgz",
+      "integrity": "sha512-vE7JKRyES09KiunauX7nd2Q9/L7lhok4smP9RZTDeD4MVs72Dp2qNFVz39Nz5a0FVEW0BJR6C0DYrq6unoziZA==",
       "dev": true,
       "engines": {
-        "node": "*"
+        "node": ">= 14.16"
       }
     },
     "node_modules/performance-now": {
@@ -5777,15 +5769,6 @@
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       "dev": true
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-    "node_modules/type-detect": {
-      "version": "4.0.8",
-      "resolved": "https://registry.npmjs.org/type-detect/-/type-detect-4.0.8.tgz",
-      "integrity": "sha512-0fr/mIH1dlO+x7TlcMy+bIDqKPsw/70tVyeHW787goQjhmqaZe10uwLujubK9q9Lg6Fiho1KUKDYz0Z7k7g5/g==",
-      "dev": true,
-      "engines": {
-        "node": ">=4"
-      }
-    },
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       "version": "0.3.1",
       "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.3.1.tgz",
diff --git a/package.json b/package.json
index 364a2477..af3ac9c9 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
     "@stryker-mutator/core": "7.1.1",
     "@stryker-mutator/mocha-runner": "7.1.1",
     "allcombinations": "^1.1.5",
-    "chai": "^4.2.0",
+    "chai": "^5.0.0",
     "cucumber": "^6.0.0",
     "mocha": "^10.0.0"
   },