diff --git a/package-lock.json b/package-lock.json
index ece5d30..e6b18a6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -38,7 +38,7 @@
         "mocha": "^10.7.3",
         "prettier": "^3.3.3",
         "proxyquire": "^2.1.3",
-        "sinon": "^18.0.0",
+        "sinon": "^21.0.0",
         "sinon-chai": "^3.7.0",
         "typescript": "~5.8.3"
       },
@@ -3864,17 +3864,17 @@
       "license": "ISC"
     },
     "node_modules/sinon": {
-      "version": "18.0.0",
-      "resolved": "https://registry.npmjs.org/sinon/-/sinon-18.0.0.tgz",
-      "integrity": "sha512-+dXDXzD1sBO6HlmZDd7mXZCR/y5ECiEiGCBSGuFD/kZ0bDTofPYc6JaeGmPSF+1j1MejGUWkORbYOLDyvqCWpA==",
+      "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": {
         "@sinonjs/commons": "^3.0.1",
-        "@sinonjs/fake-timers": "^11.2.2",
-        "@sinonjs/samsam": "^8.0.0",
-        "diff": "^5.2.0",
-        "nise": "^6.0.0",
-        "supports-color": "^7"
+        "@sinonjs/fake-timers": "^13.0.5",
+        "@sinonjs/samsam": "^8.0.1",
+        "diff": "^7.0.0",
+        "supports-color": "^7.2.0"
       },
       "funding": {
         "type": "opencollective",
@@ -3890,13 +3890,14 @@
         "sinon": ">=4.0.0"
       }
     },
-    "node_modules/sinon/node_modules/@sinonjs/fake-timers": {
-      "version": "11.2.2",
-      "resolved": "https://registry.npmjs.org/@sinonjs/fake-timers/-/fake-timers-11.2.2.tgz",
-      "integrity": "sha512-G2piCSxQ7oWOxwGSAyFHfPIsyeJGXYtc6mFbnFA+kRXkiEnTl8c/8jul2S329iFBnDI9HGoeWWAZvuvOkZccgw==",
+    "node_modules/sinon/node_modules/diff": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/diff/-/diff-7.0.0.tgz",
+      "integrity": "sha512-PJWHUb1RFevKCwaFA9RlG5tCd+FO5iRh9A8HEtkmBH2Li03iJriB6m6JIN4rGz3K3JLawI7/veA1xzRKP6ISBw==",
       "dev": true,
-      "dependencies": {
-        "@sinonjs/commons": "^3.0.0"
+      "license": "BSD-3-Clause",
+      "engines": {
+        "node": ">=0.3.1"
       }
     },
     "node_modules/source-map": {
diff --git a/package.json b/package.json
index d173ee6..6435532 100644
--- a/package.json
+++ b/package.json
@@ -56,7 +56,7 @@
     "mocha": "^10.7.3",
     "prettier": "^3.3.3",
     "proxyquire": "^2.1.3",
-    "sinon": "^18.0.0",
+    "sinon": "^21.0.0",
     "sinon-chai": "^3.7.0",
     "typescript": "~5.8.3"
   },