diff --git a/package-lock.json b/package-lock.json
index 7d04103..231324c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -40,7 +40,7 @@
         "mocha": "^11.6.0",
         "nyc": "^17.1.0",
         "rimraf": "^6.0.1",
-        "sinon": "^20.0.0",
+        "sinon": "^21.0.0",
         "standard-version": "^9.5.0",
         "ts-node": "^10.9.2",
         "typescript": "^5.8.3",
@@ -10193,9 +10193,9 @@
       }
     },
     "node_modules/sinon": {
-      "version": "20.0.0",
-      "resolved": "https://registry.npmjs.org/sinon/-/sinon-20.0.0.tgz",
-      "integrity": "sha512-+FXOAbdnj94AQIxH0w1v8gzNxkawVvNqE3jUzRLptR71Oykeu2RrQXXl/VQjKay+Qnh73fDt/oDfMo6xMeDQbQ==",
+      "version": "21.0.0",
+      "resolved": "https://registry.npmjs.org/sinon/-/sinon-21.0.0.tgz",
+      "integrity": "sha512-TOgRcwFPbfGtpqvZw+hyqJDvqfapr1qUlOizROIk4bBLjlsjlB00Pg6wMFXNtJRpu+eCZuVOaLatG7M8105kAw==",
       "dev": true,
       "license": "BSD-3-Clause",
       "dependencies": {
@@ -18775,9 +18775,9 @@
       }
     },
     "sinon": {
-      "version": "20.0.0",
-      "resolved": "https://registry.npmjs.org/sinon/-/sinon-20.0.0.tgz",
-      "integrity": "sha512-+FXOAbdnj94AQIxH0w1v8gzNxkawVvNqE3jUzRLptR71Oykeu2RrQXXl/VQjKay+Qnh73fDt/oDfMo6xMeDQbQ==",
+      "version": "21.0.0",
+      "resolved": "https://registry.npmjs.org/sinon/-/sinon-21.0.0.tgz",
+      "integrity": "sha512-TOgRcwFPbfGtpqvZw+hyqJDvqfapr1qUlOizROIk4bBLjlsjlB00Pg6wMFXNtJRpu+eCZuVOaLatG7M8105kAw==",
       "dev": true,
       "requires": {
         "@sinonjs/commons": "^3.0.1",
diff --git a/package.json b/package.json
index 0b76de6..b2eea58 100644
--- a/package.json
+++ b/package.json
@@ -77,7 +77,7 @@
     "mocha": "^11.6.0",
     "nyc": "^17.1.0",
     "rimraf": "^6.0.1",
-    "sinon": "^20.0.0",
+    "sinon": "^21.0.0",
     "standard-version": "^9.5.0",
     "ts-node": "^10.9.2",
     "typescript": "^5.8.3",