diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9bac4d2e1..5bdc636c9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Improved the loading state of the activity count in the portfolio summary
 - Migrated the create dialog of the watchlist to a dedicated route
 - Changed the holdings endpoint to return active and closed holdings by default and reuse a single snapshot for both types
+- Upgraded `countries-and-timezones` from version `3.9.0` to `3.10.0`
 - Upgraded `bull-board` from version `9.0.1` to `9.5.0`
 - Upgraded `zod` from version `4.4.3` to `4.5.4`
 
diff --git a/package-lock.json b/package-lock.json
index ba53c3025..c740e9003 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -67,7 +67,7 @@
         "class-validator": "0.15.1",
         "color": "5.0.3",
         "cookie-parser": "1.4.7",
-        "countries-and-timezones": "3.9.0",
+        "countries-and-timezones": "3.10.0",
         "countries-list": "3.4.1",
         "countup.js": "2.10.1",
         "date-fns": "4.4.0",
@@ -19044,9 +19044,9 @@
       }
     },
     "node_modules/countries-and-timezones": {
-      "version": "3.9.0",
-      "resolved": "https://registry.npmjs.org/countries-and-timezones/-/countries-and-timezones-3.9.0.tgz",
-      "integrity": "sha512-3upkVtUfZgdp5xOQI/Deg1ye73ae6bygJMO4UvtUi6wLjwcj7cBqx2PzSZ1VL8i5iveBbjhsQp2Judx7kPKivA==",
+      "version": "3.10.0",
+      "resolved": "https://registry.npmjs.org/countries-and-timezones/-/countries-and-timezones-3.10.0.tgz",
+      "integrity": "sha512-HQ1GtXWNZy0r5MnZMLF9xmBmFNmtDVBeKQgX/5DY+RVmcZTODA+EPN/JLPCYRNP86nHG0QQrb1yJwGzXeqCCXw==",
       "license": "MIT",
       "engines": {
         "node": ">=8.x",
diff --git a/package.json b/package.json
index 1f13ab86c..7d8e6edca 100644
--- a/package.json
+++ b/package.json
@@ -111,7 +111,7 @@
     "class-validator": "0.15.1",
     "color": "5.0.3",
     "cookie-parser": "1.4.7",
-    "countries-and-timezones": "3.9.0",
+    "countries-and-timezones": "3.10.0",
     "countries-list": "3.4.1",
     "countup.js": "2.10.1",
     "date-fns": "4.4.0",