diff --git a/package-lock.json b/package-lock.json
index 79a5354a..a9d6c9a8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -34,7 +34,7 @@
         "chai": "^5.1.2",
         "mocha": "^11.7.1",
         "mocha-suppress-logs": "^0.6.0",
-        "sinon": "^20.0.0",
+        "sinon": "^21.0.0",
         "typescript": "^5.8.3"
       },
       "engines": {
@@ -1939,11 +1939,10 @@
       }
     },
     "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": {
         "@sinonjs/commons": "^3.0.1",
         "@sinonjs/fake-timers": "^13.0.5",
diff --git a/package.json b/package.json
index c6bd9b3f..b2af0d41 100644
--- a/package.json
+++ b/package.json
@@ -58,7 +58,7 @@
     "chai": "^5.1.2",
     "mocha": "^11.7.1",
     "mocha-suppress-logs": "^0.6.0",
-    "sinon": "^20.0.0",
+    "sinon": "^21.0.0",
     "typescript": "^5.8.3"
   }
 }