diff --git a/packages/backend/server/package.json b/packages/backend/server/package.json
index 9293c26136..bfd8e65f8e 100644
--- a/packages/backend/server/package.json
+++ b/packages/backend/server/package.json
@@ -140,7 +140,7 @@
     "cross-env": "^7.0.3",
     "nodemon": "^3.1.7",
     "react-email": "4.0.2",
-    "sinon": "^19.0.2",
+    "sinon": "^20.0.0",
     "supertest": "^7.0.0",
     "why-is-node-running": "^3.2.2"
   },
diff --git a/yarn.lock b/yarn.lock
index c3019bccba..6fb4227e0d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -966,7 +966,7 @@ __metadata:
     rxjs: "npm:^7.8.1"
     semver: "npm:^7.6.3"
     ses: "npm:^1.10.0"
-    sinon: "npm:^19.0.2"
+    sinon: "npm:^20.0.0"
     socket.io: "npm:^4.8.1"
     stripe: "npm:^17.4.0"
     supertest: "npm:^7.0.0"
@@ -12558,7 +12558,7 @@ __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:
@@ -12578,13 +12578,6 @@ __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
-
 "@slack/logger@npm:^4.0.0":
   version: 4.0.0
   resolution: "@slack/logger@npm:4.0.0"
@@ -24593,13 +24586,6 @@ __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
-
 "jwa@npm:^2.0.0":
   version: 2.0.0
   resolution: "jwa@npm:2.0.0"
@@ -27194,19 +27180,6 @@ __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"
@@ -28325,7 +28298,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"path-to-regexp@npm:8.2.0, path-to-regexp@npm:^8.0.0, path-to-regexp@npm:^8.1.0":
+"path-to-regexp@npm:8.2.0, path-to-regexp@npm:^8.0.0":
   version: 8.2.0
   resolution: "path-to-regexp@npm:8.2.0"
   checksum: 10/23378276a172b8ba5f5fb824475d1818ca5ccee7bbdb4674701616470f23a14e536c1db11da9c9e6d82b82c556a817bbf4eee6e41b9ed20090ef9427cbb38e13
@@ -31286,17 +31259,16 @@ __metadata:
   languageName: node
   linkType: hard
 
-"sinon@npm:^19.0.2":
-  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