diff --git a/packages/bot/package.json b/packages/bot/package.json
index 5539071ab..47e401efb 100644
--- a/packages/bot/package.json
+++ b/packages/bot/package.json
@@ -39,7 +39,7 @@
     "@types/chai": "^5.2.3",
     "@types/mocha": "^10.0.10",
     "@types/node": "^24.10.1",
-    "@types/sinon": "^17.0.4",
+    "@types/sinon": "^21.0.0",
     "c8": "^10.1.3",
     "chai": "^6.2.0",
     "mocha": "^11.7.5",
diff --git a/packages/gateway/package.json b/packages/gateway/package.json
index fec3d3674..61333e7b2 100644
--- a/packages/gateway/package.json
+++ b/packages/gateway/package.json
@@ -41,7 +41,7 @@
     "@types/chai": "^5.2.3",
     "@types/mocha": "^10.0.10",
     "@types/node": "^24.10.1",
-    "@types/sinon": "^17.0.4",
+    "@types/sinon": "^21.0.0",
     "@types/ws": "^8.18.1",
     "c8": "^10.1.3",
     "chai": "^6.2.0",
diff --git a/packages/rest/package.json b/packages/rest/package.json
index 99e35c8c7..92dfaac59 100644
--- a/packages/rest/package.json
+++ b/packages/rest/package.json
@@ -38,7 +38,7 @@
     "@types/chai-as-promised": "^8.0.2",
     "@types/mocha": "^10.0.10",
     "@types/node": "^24.10.1",
-    "@types/sinon": "^17.0.4",
+    "@types/sinon": "^21.0.0",
     "c8": "^10.1.3",
     "chai": "^6.2.0",
     "chai-as-promised": "^8.0.2",
diff --git a/packages/utils/package.json b/packages/utils/package.json
index 125a86026..786afe375 100644
--- a/packages/utils/package.json
+++ b/packages/utils/package.json
@@ -35,7 +35,7 @@
     "@types/chai": "^5.2.3",
     "@types/mocha": "^10.0.10",
     "@types/node": "^24.10.1",
-    "@types/sinon": "^17.0.4",
+    "@types/sinon": "^21.0.0",
     "c8": "^10.1.3",
     "chai": "^6.2.0",
     "mocha": "^11.7.5",
diff --git a/yarn.lock b/yarn.lock
index d182d3454..3a01a2013 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -126,7 +126,7 @@ __metadata:
     "@types/chai": "npm:^5.2.3"
     "@types/mocha": "npm:^10.0.10"
     "@types/node": "npm:^24.10.1"
-    "@types/sinon": "npm:^17.0.4"
+    "@types/sinon": "npm:^21.0.0"
     c8: "npm:^10.1.3"
     chai: "npm:^6.2.0"
     mocha: "npm:^11.7.5"
@@ -149,7 +149,7 @@ __metadata:
     "@types/chai": "npm:^5.2.3"
     "@types/mocha": "npm:^10.0.10"
     "@types/node": "npm:^24.10.1"
-    "@types/sinon": "npm:^17.0.4"
+    "@types/sinon": "npm:^21.0.0"
     "@types/ws": "npm:^8.18.1"
     c8: "npm:^10.1.3"
     chai: "npm:^6.2.0"
@@ -179,7 +179,7 @@ __metadata:
     "@types/chai-as-promised": "npm:^8.0.2"
     "@types/mocha": "npm:^10.0.10"
     "@types/node": "npm:^24.10.1"
-    "@types/sinon": "npm:^17.0.4"
+    "@types/sinon": "npm:^21.0.0"
     c8: "npm:^10.1.3"
     chai: "npm:^6.2.0"
     chai-as-promised: "npm:^8.0.2"
@@ -220,7 +220,7 @@ __metadata:
     "@types/chai": "npm:^5.2.3"
     "@types/mocha": "npm:^10.0.10"
     "@types/node": "npm:^24.10.1"
-    "@types/sinon": "npm:^17.0.4"
+    "@types/sinon": "npm:^21.0.0"
     c8: "npm:^10.1.3"
     chai: "npm:^6.2.0"
     mocha: "npm:^11.7.5"
@@ -845,12 +845,12 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@types/sinon@npm:^17.0.4":
-  version: 17.0.4
-  resolution: "@types/sinon@npm:17.0.4"
+"@types/sinon@npm:^21.0.0":
+  version: 21.0.0
+  resolution: "@types/sinon@npm:21.0.0"
   dependencies:
     "@types/sinonjs__fake-timers": "npm:*"
-  checksum: 10c0/7c67ae1050d98a86d8dd771f0a764e97adb9d54812bf3b001195f8cfaa1e2bdfc725d5b970b91e7b0bb6b7c1ca209f47993f2c6f84f1f868313c37441313ca5b
+  checksum: 10c0/276d610b5f975eba875c207075d031389d9321d407ff2210106301471893e1198fe83798c507b241620f498735806ab729aaca59b51a340d31875e5d61e18d3a
   languageName: node
   linkType: hard