diff --git a/package-lock.json b/package-lock.json
index 9af6b58d..ae9c9d6a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -32,7 +32,7 @@
         "globstar": "^1.0.0",
         "oclif": "^4.20.1",
         "shx": "^0.4.0",
-        "sinon": "^20.0.0",
+        "sinon": "^21.0.0",
         "ts-node": "^10.9.2",
         "tsx": "^4.20.3",
         "typescript": "^5.8.3"
@@ -11571,9 +11571,9 @@
       }
     },
     "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 cd15d74e..120a692d 100644
--- a/package.json
+++ b/package.json
@@ -56,7 +56,7 @@
     "globstar": "^1.0.0",
     "oclif": "^4.20.1",
     "shx": "^0.4.0",
-    "sinon": "^20.0.0",
+    "sinon": "^21.0.0",
     "ts-node": "^10.9.2",
     "tsx": "^4.20.3",
     "typescript": "^5.8.3"