diff --git a/package-lock.json b/package-lock.json
index 98524cd1..b466b284 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -23,7 +23,7 @@
         "glob": "^11.0.0",
         "prettier": "3.5.3",
         "semantic-release-plugin-update-version-in-files": "^2.0.0",
-        "sinon": "^20.0.0",
+        "sinon": "^21.0.0",
         "sort-keys": "^5.0.0",
         "string-to-jsdoc-comment": "^1.0.0",
         "typescript": "^5.0.0",
@@ -2294,9 +2294,9 @@
       }
     },
     "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": {
diff --git a/package.json b/package.json
index 87008212..5dd96f0d 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "glob": "^11.0.0",
     "prettier": "3.5.3",
     "semantic-release-plugin-update-version-in-files": "^2.0.0",
-    "sinon": "^20.0.0",
+    "sinon": "^21.0.0",
     "sort-keys": "^5.0.0",
     "string-to-jsdoc-comment": "^1.0.0",
     "typescript": "^5.0.0",