diff --git a/CHANGELOG.md b/CHANGELOG.md
index 116acb26e..febd47f84 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+### Changed
+
+- Upgraded `yahoo-finance2` from version `4.0.0` to `4.0.2`
+
 ## 3.56.0 - 2026-08-20
 
 ### Changed
diff --git a/package-lock.json b/package-lock.json
index b1818e8d6..2f224bb95 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -98,7 +98,7 @@
         "twitter-api-v2": "1.29.0",
         "undici": "8.5.0",
         "uuid": "14.0.1",
-        "yahoo-finance2": "4.0.0",
+        "yahoo-finance2": "4.0.2",
         "zod": "4.4.3",
         "zone.js": "0.16.1"
       },
@@ -34064,9 +34064,9 @@
       }
     },
     "node_modules/tough-cookie": {
-      "version": "6.0.1",
-      "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-6.0.1.tgz",
-      "integrity": "sha512-LktZQb3IeoUWB9lqR5EWTHgW/VTITCXg4D21M+lvybRVdylLrRMnqaIONLVb5mav8vM19m44HIcGq4qASeu2Qw==",
+      "version": "6.0.2",
+      "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-6.0.2.tgz",
+      "integrity": "sha512-exgYmnmL/sJpR3upZfXG5PoatXQii55xAiXGXzY+sROLZ/Y+SLcp9PgJNI9Vz37HpQ74WvDcLT8eqm+kV3FzrA==",
       "license": "BSD-3-Clause",
       "dependencies": {
         "tldts": "^7.0.5"
@@ -36824,18 +36824,18 @@
       }
     },
     "node_modules/yahoo-finance2": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/yahoo-finance2/-/yahoo-finance2-4.0.0.tgz",
-      "integrity": "sha512-3AUMLycIxGSKEf99nEedmsccBLAXyVajCfKlY+Vxsxx6ntsDlFYN1UdL6APGMFiRs8IBivn62eJT4Zj3WQdrlw==",
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/yahoo-finance2/-/yahoo-finance2-4.0.2.tgz",
+      "integrity": "sha512-wjNd6/l7dS7NrBPePbX8r2P/MkXK6bL86wW6Mqd34GuY3Kab2s80DkrYEchcOoS569Q0loQUztz3NeNxjd827A==",
       "license": "MIT",
       "dependencies": {
         "@deno/shim-deno": "~0.18.0",
-        "@modelcontextprotocol/sdk": "npm:@modelcontextprotocol/sdk@^1.26.0",
+        "@modelcontextprotocol/sdk": "npm:@modelcontextprotocol/sdk@^1.30.0",
         "fetch-mock-cache": "npm:fetch-mock-cache@^3.1.0",
         "json-schema": "^0.4.0",
-        "tough-cookie": "npm:tough-cookie@^6.0.0",
-        "tough-cookie-file-store": "npm:tough-cookie-file-store@^3.0.0",
-        "zod": "npm:zod@^4.0.0"
+        "tough-cookie": "npm:tough-cookie@^6.0.2",
+        "tough-cookie-file-store": "npm:tough-cookie-file-store@^3.3.0",
+        "zod": "npm:zod@^4.4.3"
       },
       "bin": {
         "yahoo-finance": "esm/bin/yahoo-finance.js",
diff --git a/package.json b/package.json
index 1d3e68fee..2bba3e106 100644
--- a/package.json
+++ b/package.json
@@ -142,7 +142,7 @@
     "twitter-api-v2": "1.29.0",
     "undici": "8.5.0",
     "uuid": "14.0.1",
-    "yahoo-finance2": "4.0.0",
+    "yahoo-finance2": "4.0.2",
     "zod": "4.4.3",
     "zone.js": "0.16.1"
   },