diff --git a/package-lock.json b/package-lock.json
index 5c44a462..ebaba26c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,7 +14,7 @@
         "toucan-js": "^4.1.1"
       },
       "devDependencies": {
-        "@cloudflare/workers-types": "^4.20250414.0",
+        "@cloudflare/workers-types": "^4.20250421.0",
         "@eslint/eslintrc": "^3.2.0",
         "@eslint/js": "^9.24.0",
         "@reporters/github": "^1.7.2",
@@ -1017,9 +1017,9 @@
       }
     },
     "node_modules/@cloudflare/workers-types": {
-      "version": "4.20250414.0",
-      "resolved": "https://registry.npmjs.org/@cloudflare/workers-types/-/workers-types-4.20250414.0.tgz",
-      "integrity": "sha512-ZHl8LiyUMWiIxYqpasen8Lc75Ef+0afqL26TEd95eRIi5kgkEbjDJ7uIUnpxMoZTRI0J8Hy5YEPtt4nFXt+TpA==",
+      "version": "4.20250421.0",
+      "resolved": "https://registry.npmjs.org/@cloudflare/workers-types/-/workers-types-4.20250421.0.tgz",
+      "integrity": "sha512-GYSmQxF9ZE2kkmjCSiYTFdcXUHPeBrz9XvKhqGLTKT8ITYxN5kXy9OYlpkhtVWWUE+XNq7qm5uSKwluaOBKoAw==",
       "dev": true,
       "license": "MIT OR Apache-2.0"
     },
diff --git a/package.json b/package.json
index 7624e988..62f9fd00 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
     "build:handlebars": "node scripts/compile-handlebars.js"
   },
   "devDependencies": {
-    "@cloudflare/workers-types": "^4.20250414.0",
+    "@cloudflare/workers-types": "^4.20250421.0",
     "@eslint/eslintrc": "^3.2.0",
     "@eslint/js": "^9.24.0",
     "@reporters/github": "^1.7.2",