diff --git a/package-lock.json b/package-lock.json
index c52af17..d7847be 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -28,7 +28,7 @@
         "eslint-plugin-standard": "^5.0.0",
         "expect.js": "^0.3.1",
         "mocha": "^11.7.4",
-        "sinon": "^19.0.2"
+        "sinon": "^21.0.0"
       },
       "engines": {
         "node": ">= 16.0.0"
@@ -4661,16 +4661,15 @@
       }
     },
     "node_modules/sinon": {
-      "version": "19.0.2",
-      "resolved": "https://registry.npmjs.org/sinon/-/sinon-19.0.2.tgz",
-      "integrity": "sha512-euuToqM+PjO4UgXeLETsfQiuoyPXlqFezr6YZDFwHR3t4qaX0fZUe1MfPMznTL5f8BWrVS89KduLdMUsxFCO6g==",
+      "version": "21.0.0",
+      "resolved": "https://registry.npmjs.org/sinon/-/sinon-21.0.0.tgz",
+      "integrity": "sha512-TOgRcwFPbfGtpqvZw+hyqJDvqfapr1qUlOizROIk4bBLjlsjlB00Pg6wMFXNtJRpu+eCZuVOaLatG7M8105kAw==",
       "dev": true,
       "dependencies": {
         "@sinonjs/commons": "^3.0.1",
-        "@sinonjs/fake-timers": "^13.0.2",
+        "@sinonjs/fake-timers": "^13.0.5",
         "@sinonjs/samsam": "^8.0.1",
         "diff": "^7.0.0",
-        "nise": "^6.1.1",
         "supports-color": "^7.2.0"
       },
       "funding": {
@@ -4679,9 +4678,9 @@
       }
     },
     "node_modules/sinon/node_modules/@sinonjs/fake-timers": {
-      "version": "13.0.2",
-      "resolved": "https://registry.npmjs.org/@sinonjs/fake-timers/-/fake-timers-13.0.2.tgz",
-      "integrity": "sha512-4Bb+oqXZTSTZ1q27Izly9lv8B9dlV61CROxPiVtywwzv5SnytJqhvYe6FclHYuXml4cd1VHPo1zd5PmTeJozvA==",
+      "version": "13.0.5",
+      "resolved": "https://registry.npmjs.org/@sinonjs/fake-timers/-/fake-timers-13.0.5.tgz",
+      "integrity": "sha512-36/hTbH2uaWuGVERyC6da9YwGWnzUZXuPro/F2LfsdOsLnCojz/iSH8MxUt/FD2S5XBSVPhmArFUXcpCQ2Hkiw==",
       "dev": true,
       "dependencies": {
         "@sinonjs/commons": "^3.0.1"
@@ -8625,23 +8624,22 @@
       "dev": true
     },
     "sinon": {
-      "version": "19.0.2",
-      "resolved": "https://registry.npmjs.org/sinon/-/sinon-19.0.2.tgz",
-      "integrity": "sha512-euuToqM+PjO4UgXeLETsfQiuoyPXlqFezr6YZDFwHR3t4qaX0fZUe1MfPMznTL5f8BWrVS89KduLdMUsxFCO6g==",
+      "version": "21.0.0",
+      "resolved": "https://registry.npmjs.org/sinon/-/sinon-21.0.0.tgz",
+      "integrity": "sha512-TOgRcwFPbfGtpqvZw+hyqJDvqfapr1qUlOizROIk4bBLjlsjlB00Pg6wMFXNtJRpu+eCZuVOaLatG7M8105kAw==",
       "dev": true,
       "requires": {
         "@sinonjs/commons": "^3.0.1",
-        "@sinonjs/fake-timers": "^13.0.2",
+        "@sinonjs/fake-timers": "^13.0.5",
         "@sinonjs/samsam": "^8.0.1",
         "diff": "^7.0.0",
-        "nise": "^6.1.1",
         "supports-color": "^7.2.0"
       },
       "dependencies": {
         "@sinonjs/fake-timers": {
-          "version": "13.0.2",
-          "resolved": "https://registry.npmjs.org/@sinonjs/fake-timers/-/fake-timers-13.0.2.tgz",
-          "integrity": "sha512-4Bb+oqXZTSTZ1q27Izly9lv8B9dlV61CROxPiVtywwzv5SnytJqhvYe6FclHYuXml4cd1VHPo1zd5PmTeJozvA==",
+          "version": "13.0.5",
+          "resolved": "https://registry.npmjs.org/@sinonjs/fake-timers/-/fake-timers-13.0.5.tgz",
+          "integrity": "sha512-36/hTbH2uaWuGVERyC6da9YwGWnzUZXuPro/F2LfsdOsLnCojz/iSH8MxUt/FD2S5XBSVPhmArFUXcpCQ2Hkiw==",
           "dev": true,
           "requires": {
             "@sinonjs/commons": "^3.0.1"
diff --git a/package.json b/package.json
index e2a46a3..c3a883e 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,7 @@
     "eslint-plugin-standard": "^5.0.0",
     "expect.js": "^0.3.1",
     "mocha": "^11.7.4",
-    "sinon": "^19.0.2"
+    "sinon": "^21.0.0"
   },
   "preferGlobal": true
 }