diff --git a/client/package-lock.json b/client/package-lock.json
index 27e3bbf..d04addc 100644
--- a/client/package-lock.json
+++ b/client/package-lock.json
@@ -13,27 +13,27 @@
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         "react": "^19.0.0",
         "react-dom": "^19.0.0",
-        "react-router": "^7.1.5"
+        "react-router": "^7.18.2"
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         "@types/d3": "^7.4.3",
         "@types/react": "^19.0.8",
         "@types/react-dom": "^19.0.3",
-        "@vitejs/plugin-react": "^4.3.4",
+        "@vitejs/plugin-react": "^4.7.0",
         "tailwindcss": "^4.0.6",
         "typescript": "^5.7.2",
-        "vite": "^6.0.11"
+        "vite": "^6.4.3"
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-      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.29.0.tgz",
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+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.29.7.tgz",
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       "license": "MIT",
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-        "@babel/helper-validator-identifier": "^7.28.5",
+        "@babel/helper-validator-identifier": "^7.29.7",
         "js-tokens": "^4.0.0",
         "picocolors": "^1.1.1"
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@@ -42,9 +42,9 @@
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-      "resolved": "https://registry.npmjs.org/@babel/compat-data/-/compat-data-7.29.0.tgz",
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+      "resolved": "https://registry.npmjs.org/@babel/compat-data/-/compat-data-7.29.7.tgz",
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@@ -52,21 +52,21 @@
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+      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.29.7.tgz",
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-        "@babel/template": "^7.28.6",
-        "@babel/traverse": "^7.29.0",
-        "@babel/types": "^7.29.0",
+        "@babel/code-frame": "^7.29.7",
+        "@babel/generator": "^7.29.7",
+        "@babel/helper-compilation-targets": "^7.29.7",
+        "@babel/helper-module-transforms": "^7.29.7",
+        "@babel/helpers": "^7.29.7",
+        "@babel/parser": "^7.29.7",
+        "@babel/template": "^7.29.7",
+        "@babel/traverse": "^7.29.7",
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@@ -83,14 +83,14 @@
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+      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.29.8.tgz",
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       "dev": true,
       "license": "MIT",
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-        "@babel/parser": "^7.29.0",
-        "@babel/types": "^7.29.0",
+        "@babel/parser": "^7.29.8",
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@@ -100,14 +100,14 @@
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+      "resolved": "https://registry.npmjs.org/@babel/helper-compilation-targets/-/helper-compilation-targets-7.29.7.tgz",
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       "license": "MIT",
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-        "@babel/compat-data": "^7.28.6",
-        "@babel/helper-validator-option": "^7.27.1",
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@@ -117,9 +117,9 @@
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@@ -127,29 +127,29 @@
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+      "resolved": "https://registry.npmjs.org/@babel/helper-module-imports/-/helper-module-imports-7.29.7.tgz",
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       "license": "MIT",
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-        "@babel/traverse": "^7.28.6",
-        "@babel/types": "^7.28.6"
+        "@babel/traverse": "^7.29.7",
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+      "resolved": "https://registry.npmjs.org/@babel/helper-module-transforms/-/helper-module-transforms-7.29.7.tgz",
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-        "@babel/helper-validator-identifier": "^7.28.5",
-        "@babel/traverse": "^7.28.6"
+        "@babel/helper-module-imports": "^7.29.7",
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@@ -169,9 +169,9 @@
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+      "resolved": "https://registry.npmjs.org/@babel/helper-string-parser/-/helper-string-parser-7.29.7.tgz",
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@@ -179,9 +179,9 @@
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@@ -189,9 +189,9 @@
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@@ -199,27 +199,27 @@
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       "license": "MIT",
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-        "@babel/template": "^7.28.6",
-        "@babel/types": "^7.29.0"
+        "@babel/template": "^7.29.7",
+        "@babel/types": "^7.29.7"
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-      "version": "7.29.2",
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+      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.29.8.tgz",
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       "license": "MIT",
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-        "@babel/types": "^7.29.0"
+        "@babel/types": "^7.29.8"
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@@ -261,33 +261,33 @@
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+      "resolved": "https://registry.npmjs.org/@babel/template/-/template-7.29.7.tgz",
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-        "@babel/parser": "^7.28.6",
-        "@babel/types": "^7.28.6"
+        "@babel/code-frame": "^7.29.7",
+        "@babel/parser": "^7.29.7",
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-        "@babel/types": "^7.29.0",
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+        "@babel/template": "^7.29.7",
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@@ -295,14 +295,14 @@
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@@ -1887,9 +1887,9 @@
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-      "license": "MIT"
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diff --git a/server/package-lock.json b/server/package-lock.json
index 40d1b5b..b8efecb 100644
--- a/server/package-lock.json
+++ b/server/package-lock.json
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@@ -179,9 +180,9 @@
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@@ -213,9 +214,9 @@
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@@ -230,9 +231,9 @@
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-      "resolved": "https://registry.npmjs.org/@esbuild/linux-mips64el/-/linux-mips64el-0.27.7.tgz",
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@@ -247,9 +248,9 @@
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@@ -264,9 +265,9 @@
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@@ -298,9 +299,9 @@
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-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/side-channel/-/side-channel-1.1.0.tgz",
-      "integrity": "sha512-ZX99e6tRweoUXqR+VBrslhda51Nh5MTQwou5tnUDgbtyM0dBgmhEDtWGP/xbKn6hqfPRHujUNwz5fy/wbbhnpw==",
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/side-channel/-/side-channel-1.1.1.tgz",
+      "integrity": "sha512-6x6dK6zJdpTzF4sQeNYxwtvBzf6Eg4GtlesS94HOvTudUeyK2WXAaIfmDgsyslYrRBeFIlsi54AYsFGUuhmvrQ==",
       "license": "MIT",
       "dependencies": {
         "es-errors": "^1.3.0",
-        "object-inspect": "^1.13.3",
-        "side-channel-list": "^1.0.0",
+        "object-inspect": "^1.13.4",
+        "side-channel-list": "^1.0.1",
         "side-channel-map": "^1.0.1",
         "side-channel-weakmap": "^1.0.2"
       },
@@ -1670,13 +1700,13 @@
       }
     },
     "node_modules/side-channel-list": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/side-channel-list/-/side-channel-list-1.0.0.tgz",
-      "integrity": "sha512-FCLHtRD/gnpCiCHEiJLOwdmFP+wzCmDEkc9y7NsYxeF4u7Btsn1ZuwgwJGxImImHicJArLP4R0yX4c2KCrMrTA==",
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/side-channel-list/-/side-channel-list-1.0.1.tgz",
+      "integrity": "sha512-mjn/0bi/oUURjc5Xl7IaWi/OJJJumuoJFQJfDDyO46+hBWsfaVM65TBHq2eoZBhzl9EchxOijpkbRC8SVBQU0w==",
       "license": "MIT",
       "dependencies": {
         "es-errors": "^1.3.0",
-        "object-inspect": "^1.13.3"
+        "object-inspect": "^1.13.4"
       },
       "engines": {
         "node": ">= 0.4"
@@ -1741,14 +1771,13 @@
       }
     },
     "node_modules/tsx": {
-      "version": "4.21.0",
-      "resolved": "https://registry.npmjs.org/tsx/-/tsx-4.21.0.tgz",
-      "integrity": "sha512-5C1sg4USs1lfG0GFb2RLXsdpXqBSEhAaA/0kPL01wxzpMqLILNxIxIOKiILz+cdg/pLnOUxFYOR5yhHU666wbw==",
+      "version": "4.23.12",
+      "resolved": "https://registry.npmjs.org/tsx/-/tsx-4.23.12.tgz",
+      "integrity": "sha512-FDf4L4sYzKtzWYhU/Xm0AQFdTjdIxNo9ElTf2mxXM6k8YMHXzYUe4yODVaXP4V9uMFbVg8c0qyBccK2OOxb45Q==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "esbuild": "~0.27.0",
-        "get-tsconfig": "^4.7.5"
+        "esbuild": "~0.28.0"
       },
       "bin": {
         "tsx": "dist/cli.mjs"
diff --git a/server/package.json b/server/package.json
index 17c7833..04f2e09 100644
--- a/server/package.json
+++ b/server/package.json
@@ -12,6 +12,7 @@
     "@octokit/rest": "^21.0.2",
     "cors": "^2.8.5",
     "express": "^4.22.2",
+    "express-rate-limit": "^8.6.2",
     "express-session": "^1.18.1",
     "helmet": "^8.0.0",
     "node-cache": "^5.1.2"
diff --git a/server/src/index.ts b/server/src/index.ts
index 677a594..6118f08 100644
--- a/server/src/index.ts
+++ b/server/src/index.ts
@@ -1,6 +1,7 @@
 import express from 'express';
 import helmet from 'helmet';
 import cors from 'cors';
+import rateLimit from 'express-rate-limit';
 import session from 'express-session';
 import path from 'path';
 import { authRouter } from './routes/auth.routes.js';
@@ -29,6 +30,26 @@ app.use(
   })
 );
 
+// Rate limiting
+const apiLimiter = rateLimit({
+  windowMs: 15 * 60 * 1000, // 15 minutes
+  max: 100, // limit each IP to 100 requests per windowMs
+  standardHeaders: true,
+  legacyHeaders: false,
+  message: { error: 'Too many requests, please try again later.' },
+});
+
+const authLimiter = rateLimit({
+  windowMs: 15 * 60 * 1000,
+  max: 10, // stricter limit for auth endpoints
+  standardHeaders: true,
+  legacyHeaders: false,
+  message: { error: 'Too many authentication attempts, please try again later.' },
+});
+
+app.use('/api/', apiLimiter);
+app.use('/api/auth', authLimiter);
+
 // Body parsing
 app.use(express.json());
 app.use(express.urlencoded({ extended: true }));