diff --git a/package-lock.json b/package-lock.json
index 6b504ad4..9f9de60c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,7 +14,7 @@
         "@types/chai": "5.2.3",
         "@types/mocha": "10.0.10",
         "@types/node": "24.12.4",
-        "@types/sinon": "17.0.4",
+        "@types/sinon": "21.0.1",
         "component-emitter": "2.0.0",
         "eslint": "8.57.1",
         "git-authors-cli": "1.0.53",
@@ -3595,9 +3595,9 @@
       "peer": true
     },
     "node_modules/@types/sinon": {
-      "version": "17.0.4",
-      "resolved": "https://registry.npmjs.org/@types/sinon/-/sinon-17.0.4.tgz",
-      "integrity": "sha512-RHnIrhfPO3+tJT0s7cFaXGZvsL4bbR3/k7z3P312qMS4JaS2Tk+KiwiLx1S0rQ56ERj00u1/BtdyVd0FY+Pdew==",
+      "version": "21.0.1",
+      "resolved": "https://registry.npmjs.org/@types/sinon/-/sinon-21.0.1.tgz",
+      "integrity": "sha512-5yoJSqLbjH8T9V2bksgRayuhpZy+723/z6wBOR+Soe4ZlXC0eW8Na71TeaZPUWDQvM7LYKa9UGFc6LRqxiR5fQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
diff --git a/package.json b/package.json
index 626d2d2f..f10cd5fd 100644
--- a/package.json
+++ b/package.json
@@ -203,7 +203,7 @@
     "@types/chai": "5.2.3",
     "@types/mocha": "10.0.10",
     "@types/node": "24.12.4",
-    "@types/sinon": "17.0.4",
+    "@types/sinon": "21.0.1",
     "component-emitter": "2.0.0",
     "eslint": "8.57.1",
     "git-authors-cli": "1.0.53",