diff --git a/package-lock.json b/package-lock.json
index 2e83f6e..cc6805b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -25,7 +25,7 @@
         "mocha": "^11.0.0",
         "ngrok": "^5.0.0-beta.2",
         "prettier": "^3.2.5",
-        "sinon": "^19.0.2",
+        "sinon": "^21.0.0",
         "wrangler": "^3.0.1"
       }
     },
@@ -861,10 +861,11 @@
       }
     },
     "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,
+      "license": "BSD-3-Clause",
       "dependencies": {
         "@sinonjs/commons": "^3.0.1"
       }
@@ -889,12 +890,6 @@
         "node": ">=4"
       }
     },
-    "node_modules/@sinonjs/text-encoding": {
-      "version": "0.7.3",
-      "resolved": "https://registry.npmjs.org/@sinonjs/text-encoding/-/text-encoding-0.7.3.tgz",
-      "integrity": "sha512-DE427ROAphMQzU4ENbliGYrBSYPXF+TtLg9S8vzeA+OF4ZKzoDdzfL8sxuMUGS/lgRhM6j1URSk9ghf7Xo1tyA==",
-      "dev": true
-    },
     "node_modules/@szmarczak/http-timer": {
       "version": "4.0.6",
       "resolved": "https://registry.npmjs.org/@szmarczak/http-timer/-/http-timer-4.0.6.tgz",
@@ -2469,12 +2464,6 @@
       "integrity": "sha1-nbe1lJatPzz+8wp1FC0tkwrXJlE=",
       "dev": true
     },
-    "node_modules/just-extend": {
-      "version": "6.2.0",
-      "resolved": "https://registry.npmjs.org/just-extend/-/just-extend-6.2.0.tgz",
-      "integrity": "sha512-cYofQu2Xpom82S6qD778jBDpwvvy39s1l/hrYij2u9AMdQcGRpaBu6kY4mVhuno5kJVi1DAz4aiphA2WI1/OAw==",
-      "dev": true
-    },
     "node_modules/keyv": {
       "version": "4.5.4",
       "resolved": "https://registry.npmjs.org/keyv/-/keyv-4.5.4.tgz",
@@ -2793,28 +2782,6 @@
         "uuid": "dist/bin/uuid"
       }
     },
-    "node_modules/nise": {
-      "version": "6.1.1",
-      "resolved": "https://registry.npmjs.org/nise/-/nise-6.1.1.tgz",
-      "integrity": "sha512-aMSAzLVY7LyeM60gvBS423nBmIPP+Wy7St7hsb+8/fc1HmeoHJfLO8CKse4u3BtOZvQLJghYPI2i/1WZrEj5/g==",
-      "dev": true,
-      "dependencies": {
-        "@sinonjs/commons": "^3.0.1",
-        "@sinonjs/fake-timers": "^13.0.1",
-        "@sinonjs/text-encoding": "^0.7.3",
-        "just-extend": "^6.2.0",
-        "path-to-regexp": "^8.1.0"
-      }
-    },
-    "node_modules/nise/node_modules/path-to-regexp": {
-      "version": "8.1.0",
-      "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-8.1.0.tgz",
-      "integrity": "sha512-Bqn3vc8CMHty6zuD+tG23s6v2kwxslHEhTj4eYaVKGIEB+YX/2wd0/rgXLFD9G9id9KCtbVy/3ZgmvZjpa0UdQ==",
-      "dev": true,
-      "engines": {
-        "node": ">=16"
-      }
-    },
     "node_modules/node-forge": {
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/node-forge/-/node-forge-1.3.1.tgz",
@@ -3321,16 +3288,16 @@
       }
     },
     "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,
+      "license": "BSD-3-Clause",
       "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": {
@@ -4397,9 +4364,9 @@
       }
     },
     "@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"
@@ -4424,12 +4391,6 @@
         }
       }
     },
-    "@sinonjs/text-encoding": {
-      "version": "0.7.3",
-      "resolved": "https://registry.npmjs.org/@sinonjs/text-encoding/-/text-encoding-0.7.3.tgz",
-      "integrity": "sha512-DE427ROAphMQzU4ENbliGYrBSYPXF+TtLg9S8vzeA+OF4ZKzoDdzfL8sxuMUGS/lgRhM6j1URSk9ghf7Xo1tyA==",
-      "dev": true
-    },
     "@szmarczak/http-timer": {
       "version": "4.0.6",
       "resolved": "https://registry.npmjs.org/@szmarczak/http-timer/-/http-timer-4.0.6.tgz",
@@ -5594,12 +5555,6 @@
       "integrity": "sha1-nbe1lJatPzz+8wp1FC0tkwrXJlE=",
       "dev": true
     },
-    "just-extend": {
-      "version": "6.2.0",
-      "resolved": "https://registry.npmjs.org/just-extend/-/just-extend-6.2.0.tgz",
-      "integrity": "sha512-cYofQu2Xpom82S6qD778jBDpwvvy39s1l/hrYij2u9AMdQcGRpaBu6kY4mVhuno5kJVi1DAz4aiphA2WI1/OAw==",
-      "dev": true
-    },
     "keyv": {
       "version": "4.5.4",
       "resolved": "https://registry.npmjs.org/keyv/-/keyv-4.5.4.tgz",
@@ -5842,27 +5797,6 @@
         }
       }
     },
-    "nise": {
-      "version": "6.1.1",
-      "resolved": "https://registry.npmjs.org/nise/-/nise-6.1.1.tgz",
-      "integrity": "sha512-aMSAzLVY7LyeM60gvBS423nBmIPP+Wy7St7hsb+8/fc1HmeoHJfLO8CKse4u3BtOZvQLJghYPI2i/1WZrEj5/g==",
-      "dev": true,
-      "requires": {
-        "@sinonjs/commons": "^3.0.1",
-        "@sinonjs/fake-timers": "^13.0.1",
-        "@sinonjs/text-encoding": "^0.7.3",
-        "just-extend": "^6.2.0",
-        "path-to-regexp": "^8.1.0"
-      },
-      "dependencies": {
-        "path-to-regexp": {
-          "version": "8.1.0",
-          "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-8.1.0.tgz",
-          "integrity": "sha512-Bqn3vc8CMHty6zuD+tG23s6v2kwxslHEhTj4eYaVKGIEB+YX/2wd0/rgXLFD9G9id9KCtbVy/3ZgmvZjpa0UdQ==",
-          "dev": true
-        }
-      }
-    },
     "node-forge": {
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/node-forge/-/node-forge-1.3.1.tgz",
@@ -6207,16 +6141,15 @@
       "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": {
diff --git a/package.json b/package.json
index f295a24..ace69a5 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,7 @@
     "mocha": "^11.0.0",
     "ngrok": "^5.0.0-beta.2",
     "prettier": "^3.2.5",
-    "sinon": "^19.0.2",
+    "sinon": "^21.0.0",
     "wrangler": "^3.0.1"
   }
 }