diff --git a/package-lock.json b/package-lock.json
index 4d14e938..08c1af59 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -50,7 +50,7 @@
         "mocha": "^11.7.1",
         "playwright": "^1.55.0",
         "rollup": "^4.48.1",
-        "sinon": "^20.0.0",
+        "sinon": "^21.0.0",
         "ts-node": "^10.9.2",
         "tslib": "^2.8.1",
         "tsx": "^4.20.5",
@@ -11060,9 +11060,9 @@
       "license": "ISC"
     },
     "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 aac9497c..76e64094 100644
--- a/package.json
+++ b/package.json
@@ -104,7 +104,7 @@
     "mocha": "^11.7.1",
     "playwright": "^1.55.0",
     "rollup": "^4.48.1",
-    "sinon": "^20.0.0",
+    "sinon": "^21.0.0",
     "ts-node": "^10.9.2",
     "tslib": "^2.8.1",
     "web-streams-polyfill": "^4.1.0",