diff --git a/package-lock.json b/package-lock.json
index 344c3690e..fa8b10856 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -33,7 +33,7 @@
         "eslint": "^9.30.0",
         "jasmine-browser-runner": "^3.0.0",
         "jasmine-core": "^5.8.0",
-        "sinon": "^20.0.0",
+        "sinon": "^21.0.0",
         "stylelint": "^16.21.0",
         "stylelint-config-standard-scss": "^15.0.1"
       },
@@ -11382,9 +11382,9 @@
       "integrity": "sha512-wnD2ZE+l+SPC/uoS0vXeE9L1+0wuaMqKlfz9AMUo38JsyLSBWSFcHR1Rri62LZc12vLr1gb3jl7iwQhgwpAbGQ=="
     },
     "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 443dd57bb..f31a55880 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,7 @@
     "eslint": "^9.30.0",
     "jasmine-browser-runner": "^3.0.0",
     "jasmine-core": "^5.8.0",
-    "sinon": "^20.0.0",
+    "sinon": "^21.0.0",
     "stylelint": "^16.21.0",
     "stylelint-config-standard-scss": "^15.0.1"
   },