diff --git a/package-lock.json b/package-lock.json
index fde06422..ceefc971 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -19,7 +19,7 @@
         "husky": "^9.1.7",
         "neostandard": "^0.12.1",
         "proxyquire": "^2.1.3",
-        "sinon": "^19.0.2"
+        "sinon": "^21.0.0"
       }
     },
     "node_modules/@actions/core": {
@@ -450,10 +450,11 @@
       }
     },
     "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"
       }
@@ -478,12 +479,6 @@
         "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/@stylistic/eslint-plugin": {
       "version": "2.11.0",
       "resolved": "https://registry.npmjs.org/@stylistic/eslint-plugin/-/eslint-plugin-2.11.0.tgz",
@@ -3140,12 +3135,6 @@
         "node": ">=4.0"
       }
     },
-    "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",
@@ -3356,19 +3345,6 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
-    "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/object-assign": {
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",
@@ -3583,15 +3559,6 @@
       "dev": true,
       "license": "MIT"
     },
-    "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/peowly": {
       "version": "1.3.2",
       "resolved": "https://registry.npmjs.org/peowly/-/peowly-1.3.2.tgz",
@@ -4040,16 +4007,16 @@
       }
     },
     "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": {
@@ -5217,9 +5184,9 @@
       }
     },
     "@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"
@@ -5244,12 +5211,6 @@
         }
       }
     },
-    "@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
-    },
     "@stylistic/eslint-plugin": {
       "version": "2.11.0",
       "resolved": "https://registry.npmjs.org/@stylistic/eslint-plugin/-/eslint-plugin-2.11.0.tgz",
@@ -6986,12 +6947,6 @@
         "object.values": "^1.1.6"
       }
     },
-    "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",
@@ -7140,19 +7095,6 @@
         }
       }
     },
-    "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"
-      }
-    },
     "object-assign": {
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",
@@ -7290,12 +7232,6 @@
       "version": "1.0.7",
       "dev": true
     },
-    "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
-    },
     "peowly": {
       "version": "1.3.2",
       "resolved": "https://registry.npmjs.org/peowly/-/peowly-1.3.2.tgz",
@@ -7574,16 +7510,15 @@
       "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 c6a00933..4eb36ad7 100644
--- a/package.json
+++ b/package.json
@@ -38,6 +38,6 @@
     "husky": "^9.1.7",
     "neostandard": "^0.12.1",
     "proxyquire": "^2.1.3",
-    "sinon": "^19.0.2"
+    "sinon": "^21.0.0"
   }
 }