diff --git a/package-lock.json b/package-lock.json
index b965139..ea26523 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -19,7 +19,7 @@
         "@tsconfig/recommended": "^1.0.10",
         "@types/chai": "^5.2.2",
         "@types/mocha": "^10.0.10",
-        "@types/sinon": "^20.0.0",
+        "@types/sinon": "^21.0.0",
         "@types/sinon-chai": "^4.0.0",
         "c8": "^10.1.3",
         "chai": "^5.2.1",
@@ -1010,9 +1010,9 @@
       }
     },
     "node_modules/@types/sinon": {
-      "version": "20.0.0",
-      "resolved": "https://registry.npmjs.org/@types/sinon/-/sinon-20.0.0.tgz",
-      "integrity": "sha512-etYGUC6IEevDGSWvR9WrECRA01ucR2/Oi9XMBUAdV0g4bLkNf4HlZWGiGlDOq5lgwXRwcV+PSeKgFcW4QzzYOg==",
+      "version": "21.0.0",
+      "resolved": "https://registry.npmjs.org/@types/sinon/-/sinon-21.0.0.tgz",
+      "integrity": "sha512-+oHKZ0lTI+WVLxx1IbJDNmReQaIsQJjN2e7UUrJHEeByG7bFeKJYsv1E75JxTQ9QKJDp21bAa/0W2Xo4srsDnw==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
diff --git a/package.json b/package.json
index c830230..2c5aec6 100644
--- a/package.json
+++ b/package.json
@@ -47,7 +47,7 @@
     "@tsconfig/recommended": "^1.0.10",
     "@types/chai": "^5.2.2",
     "@types/mocha": "^10.0.10",
-    "@types/sinon": "^20.0.0",
+    "@types/sinon": "^21.0.0",
     "@types/sinon-chai": "^4.0.0",
     "c8": "^10.1.3",
     "chai": "^5.2.1",