diff --git a/package-lock.json b/package-lock.json
index 6e4dcb1..f5e11cf 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,7 +9,7 @@
       "version": "1.1.0",
       "license": "Apache-2.0",
       "dependencies": {
-        "itty-router": "^3.0.12"
+        "itty-router": "^4.0.23"
       },
       "devDependencies": {
         "@cloudflare/workers-types": "^4.20231121.0",
@@ -2029,9 +2029,9 @@
       "dev": true
     },
     "node_modules/itty-router": {
-      "version": "3.0.12",
-      "resolved": "https://registry.npmjs.org/itty-router/-/itty-router-3.0.12.tgz",
-      "integrity": "sha512-s98XTPhle6GGbaFf0kYrOD3Q8gyhnqvOqkwYijC3AmkceNKqWUp13YHg6dWmqmVv4pP7l7c94XI92I0EXVGO0w=="
+      "version": "4.0.23",
+      "resolved": "https://registry.npmjs.org/itty-router/-/itty-router-4.0.23.tgz",
+      "integrity": "sha512-tP1NI8PVK43vWlBnIPqj47ni5FDSczFviA4wgBznscndo8lEvBA+pO3DD1rNbIQPcZhprr775iUTunyGvQMcBw=="
     },
     "node_modules/js-yaml": {
       "version": "4.1.0",
diff --git a/package.json b/package.json
index 9617dbe..623f284 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,7 @@
     "format": "prettier --write 'src/**/*.{js,ts,cjs,mjs}' 'tests/**/*.{js,ts,cjs,mjs}'"
   },
   "dependencies": {
-    "itty-router": "^3.0.12"
+    "itty-router": "^4.0.23"
   },
   "devDependencies": {
     "@cloudflare/workers-types": "^4.20231121.0",