diff --git a/package-lock.json b/package-lock.json
index 36cd88c..e2fa5bc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -21,7 +21,7 @@
 				"@vscode/test-electron": "2.5.2",
 				"esbuild": "0.25.5",
 				"mocha": "11.5.0",
-				"sinon": "20.0.0",
+				"sinon": "21.0.0",
 				"typescript": "5.8.3"
 			},
 			"engines": {
@@ -2358,9 +2358,9 @@
 			}
 		},
 		"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 3dae35e..2589779 100644
--- a/package.json
+++ b/package.json
@@ -188,7 +188,7 @@
 		"@vscode/test-electron": "2.5.2",
 		"esbuild": "0.25.5",
 		"mocha": "11.5.0",
-		"sinon": "20.0.0",
+		"sinon": "21.0.0",
 		"typescript": "5.8.3"
 	},
 	"dependencies": {