diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4cd090d7..10b2514c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ and this project adheres to
 ### Changed
 
 - ♻️(addon) improve Outlook add-on: i18n support, feedback link, smarter link
+- ⬆️(frontend) upgrade react-i18next from 15.1.1 to 17.0.8
 
 ### Fixed
 
diff --git a/src/frontend/package-lock.json b/src/frontend/package-lock.json
index b769174c..b2f57a81 100644
--- a/src/frontend/package-lock.json
+++ b/src/frontend/package-lock.json
@@ -33,7 +33,7 @@
         "react": "18.3.1",
         "react-aria-components": "1.14.0",
         "react-dom": "18.3.1",
-        "react-i18next": "15.1.1",
+        "react-i18next": "17.0.8",
         "use-sound": "5.0.0",
         "valtio": "2.3.2",
         "wouter": "3.10.0"
@@ -338,9 +338,9 @@
       }
     },
     "node_modules/@babel/runtime": {
-      "version": "7.28.6",
-      "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.28.6.tgz",
-      "integrity": "sha512-05WQkdpL9COIMz4LjTxGpPNCdlpyimKppYNoJ5Di5EUObifl8t4tuLuUBBZEpoLYOmfvIWrsp9fCl0HoPRVTdA==",
+      "version": "7.29.7",
+      "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.29.7.tgz",
+      "integrity": "sha512-Nq8OhGWiZIZGV6hLHoyAKLLcJihP/xFeBMGJoUrxTX2psI8dCifzLhZISFb+VWS3wFMRDmCGw5R+dOySCqPLhw==",
       "license": "MIT",
       "engines": {
         "node": ">=6.9.0"
@@ -11235,17 +11235,19 @@
       }
     },
     "node_modules/react-i18next": {
-      "version": "15.1.1",
-      "resolved": "https://registry.npmjs.org/react-i18next/-/react-i18next-15.1.1.tgz",
-      "integrity": "sha512-R/Vg9wIli2P3FfeI8o1eNJUJue5LWpFsQePCHdQDmX0Co3zkr6kdT8gAseb/yGeWbNz1Txc4bKDQuZYsC0kQfw==",
+      "version": "17.0.8",
+      "resolved": "https://registry.npmjs.org/react-i18next/-/react-i18next-17.0.8.tgz",
+      "integrity": "sha512-0ooKbGLU8JXhe1zwpQUWIeXSgLPOfwJmgheWRIUpcoA0CpyabpGhayjdG+/eA5esC1AQ8h2jWpXjJfzQzeDOCw==",
       "license": "MIT",
       "dependencies": {
-        "@babel/runtime": "^7.25.0",
-        "html-parse-stringify": "^3.0.1"
+        "@babel/runtime": "^7.29.2",
+        "html-parse-stringify": "^3.0.1",
+        "use-sync-external-store": "^1.6.0"
       },
       "peerDependencies": {
-        "i18next": ">= 23.2.3",
-        "react": ">= 16.8.0"
+        "i18next": ">= 26.2.0",
+        "react": ">= 16.8.0",
+        "typescript": "^5 || ^6"
       },
       "peerDependenciesMeta": {
         "react-dom": {
@@ -11253,6 +11255,9 @@
         },
         "react-native": {
           "optional": true
+        },
+        "typescript": {
+          "optional": true
         }
       }
     },
diff --git a/src/frontend/package.json b/src/frontend/package.json
index b4896462..70794b66 100644
--- a/src/frontend/package.json
+++ b/src/frontend/package.json
@@ -40,7 +40,7 @@
     "react": "18.3.1",
     "react-aria-components": "1.14.0",
     "react-dom": "18.3.1",
-    "react-i18next": "15.1.1",
+    "react-i18next": "17.0.8",
     "use-sound": "5.0.0",
     "valtio": "2.3.2",
     "wouter": "3.10.0"