diff --git a/package-lock.json b/package-lock.json
index e2e50fa..4c62b33 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -33,7 +33,7 @@
         "@types/mocha": "^10.0.10",
         "@types/node": "^20.17.9",
         "@types/sinon": "^17.0.3",
-        "@types/sinon-chai": "^3.2.9",
+        "@types/sinon-chai": "^4.0.0",
         "@typescript-eslint/eslint-plugin": "^8.17.0",
         "@typescript-eslint/parser": "^8.17.0",
         "@vercel/ncc": "^0.38.3",
@@ -43,7 +43,7 @@
         "mocha": "^11.0.1",
         "nyc": "^17.1.0",
         "sinon": "^19.0.2",
-        "sinon-chai": "^3.7.0",
+        "sinon-chai": "^4.0.0",
         "ts-node": "^10.9.1",
         "typescript": "^5.7.2"
       }
@@ -2349,9 +2349,9 @@
       }
     },
     "node_modules/@types/sinon-chai": {
-      "version": "3.2.12",
-      "resolved": "https://registry.npmjs.org/@types/sinon-chai/-/sinon-chai-3.2.12.tgz",
-      "integrity": "sha512-9y0Gflk3b0+NhQZ/oxGtaAJDvRywCa5sIyaVnounqLvmf93yBF4EgIRspePtkMs3Tr844nCclYMlcCNmLCvjuQ==",
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/@types/sinon-chai/-/sinon-chai-4.0.0.tgz",
+      "integrity": "sha512-Uar+qk3TmeFsUWCwtqRNqNUE7vf34+MCJiQJR5M2rd4nCbhtE8RgTiHwN/mVwbfCjhmO6DiOel/MgzHkRMJJFg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -10542,13 +10542,13 @@
       }
     },
     "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==",
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/sinon-chai/-/sinon-chai-4.0.0.tgz",
+      "integrity": "sha512-cWqO7O2I4XfJDWyWElAQ9D/dtdh5Mo0RHndsfiiYyjWnlPzBJdIvjCVURO4EjyYaC3BjV+ISNXCfTXPXTEIEWA==",
       "dev": true,
       "license": "(BSD-2-Clause OR WTFPL)",
       "peerDependencies": {
-        "chai": "^4.0.0",
+        "chai": "^5.0.0",
         "sinon": ">=4.0.0"
       }
     },
diff --git a/package.json b/package.json
index 4397fba..b09477d 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "@types/mocha": "^10.0.10",
     "@types/node": "^20.17.9",
     "@types/sinon": "^17.0.3",
-    "@types/sinon-chai": "^3.2.9",
+    "@types/sinon-chai": "^4.0.0",
     "@typescript-eslint/eslint-plugin": "^8.17.0",
     "@typescript-eslint/parser": "^8.17.0",
     "@vercel/ncc": "^0.38.3",
@@ -49,7 +49,7 @@
     "mocha": "^11.0.1",
     "nyc": "^17.1.0",
     "sinon": "^19.0.2",
-    "sinon-chai": "^3.7.0",
+    "sinon-chai": "^4.0.0",
     "ts-node": "^10.9.1",
     "typescript": "^5.7.2"
   },