diff --git a/package-lock.json b/package-lock.json
index dfb08083..ba63f6a8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -53,7 +53,7 @@
                 "jscpd": "4.0.5",
                 "prettier": "3.6.2",
                 "release-it": "19.0.3",
-                "sinon": "20.0.0",
+                "sinon": "21.0.0",
                 "typescript": "5.8.3"
             },
             "engines": {
@@ -9466,9 +9466,9 @@
             }
         },
         "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 b6ede8fc..4dd99c92 100644
--- a/package.json
+++ b/package.json
@@ -91,7 +91,7 @@
         "jscpd": "4.0.5",
         "prettier": "3.6.2",
         "release-it": "19.0.3",
-        "sinon": "20.0.0",
+        "sinon": "21.0.0",
         "typescript": "5.8.3"
     }
 }