diff --git a/package.json b/package.json
index 6aa715a87c..de04e4d206 100644
--- a/package.json
+++ b/package.json
@@ -220,7 +220,7 @@
     "prettier": "3.5.3",
     "rspack-manifest-plugin": "5.0.3",
     "serve": "14.2.4",
-    "sinon": "19.0.5",
+    "sinon": "20.0.0",
     "tar": "7.4.3",
     "terser-webpack-plugin": "5.3.14",
     "ts-lit-plugin": "2.0.2",
diff --git a/yarn.lock b/yarn.lock
index 92d45d3261..6094582951 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4449,7 +4449,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@sinonjs/fake-timers@npm:^13.0.1, @sinonjs/fake-timers@npm:^13.0.5":
+"@sinonjs/fake-timers@npm:^13.0.5":
   version: 13.0.5
   resolution: "@sinonjs/fake-timers@npm:13.0.5"
   dependencies:
@@ -4469,13 +4469,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@sinonjs/text-encoding@npm:^0.7.3":
-  version: 0.7.3
-  resolution: "@sinonjs/text-encoding@npm:0.7.3"
-  checksum: 10/f0cc89bae36e7ce159187dece7800b78831288f1913e9ae8cf8a878da5388232d2049740f6f4a43ec4b43b8ad1beb55f919f45eb9a577adb4a2a6eacb27b25fc
-  languageName: node
-  linkType: hard
-
 "@socket.io/component-emitter@npm:~3.1.0":
   version: 3.1.2
   resolution: "@socket.io/component-emitter@npm:3.1.2"
@@ -9755,7 +9748,7 @@ __metadata:
     rrule: "npm:2.8.1"
     rspack-manifest-plugin: "npm:5.0.3"
     serve: "npm:14.2.4"
-    sinon: "npm:19.0.5"
+    sinon: "npm:20.0.0"
     sortablejs: "patch:sortablejs@npm%3A1.15.3#~/.yarn/patches/sortablejs-npm-1.15.3-3235a8f83b.patch"
     stacktrace-js: "npm:2.0.2"
     superstruct: "npm:2.0.2"
@@ -10996,13 +10989,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"just-extend@npm:^6.2.0":
-  version: 6.2.0
-  resolution: "just-extend@npm:6.2.0"
-  checksum: 10/1f487b074b9e5773befdd44dc5d1b446f01f24f7d4f1f255d51c0ef7f686e8eb5f95d983b792b9ca5c8b10cd7e60a924d64103725759eddbd7f18bcb22743f92
-  languageName: node
-  linkType: hard
-
 "keyv@npm:^4.5.4":
   version: 4.5.4
   resolution: "keyv@npm:4.5.4"
@@ -11838,19 +11824,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"nise@npm:^6.1.1":
-  version: 6.1.1
-  resolution: "nise@npm:6.1.1"
-  dependencies:
-    "@sinonjs/commons": "npm:^3.0.1"
-    "@sinonjs/fake-timers": "npm:^13.0.1"
-    "@sinonjs/text-encoding": "npm:^0.7.3"
-    just-extend: "npm:^6.2.0"
-    path-to-regexp: "npm:^8.1.0"
-  checksum: 10/2d3175587cf0a351e2c91eb643fdc59d266de39f394a3ac0bace38571749d1e7f25341d763899245139b8f0d2ee048b2d3387d75ecf94c4897e947d5fc881eea
-  languageName: node
-  linkType: hard
-
 "no-case@npm:^3.0.4":
   version: 3.0.4
   resolution: "no-case@npm:3.0.4"
@@ -12524,13 +12497,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"path-to-regexp@npm:^8.1.0":
-  version: 8.2.0
-  resolution: "path-to-regexp@npm:8.2.0"
-  checksum: 10/23378276a172b8ba5f5fb824475d1818ca5ccee7bbdb4674701616470f23a14e536c1db11da9c9e6d82b82c556a817bbf4eee6e41b9ed20090ef9427cbb38e13
-  languageName: node
-  linkType: hard
-
 "path-type@npm:^6.0.0":
   version: 6.0.0
   resolution: "path-type@npm:6.0.0"
@@ -13781,17 +13747,16 @@ __metadata:
   languageName: node
   linkType: hard
 
-"sinon@npm:19.0.5":
-  version: 19.0.5
-  resolution: "sinon@npm:19.0.5"
+"sinon@npm:20.0.0":
+  version: 20.0.0
+  resolution: "sinon@npm:20.0.0"
   dependencies:
     "@sinonjs/commons": "npm:^3.0.1"
     "@sinonjs/fake-timers": "npm:^13.0.5"
     "@sinonjs/samsam": "npm:^8.0.1"
     diff: "npm:^7.0.0"
-    nise: "npm:^6.1.1"
     supports-color: "npm:^7.2.0"
-  checksum: 10/046b44260d9ebf01d9fb742bbee70d5504d2596c07bf3241f817dc2434df0afb6be4c34ec4f1b9ccc4fb8d85b16035b79f60fa3c289bfc8810231653e2ca06f4
+  checksum: 10/825cb36a58c0510cec03d9bef4fe66a12baf0e0cfdf1600423e3da1e6d57a03fe8161f4859340ea13d4c42e63da1724a260ef4c5ce119dc9ee075ad93b6e8bdd
   languageName: node
   linkType: hard