diff --git a/package-lock.json b/package-lock.json
index b18f4d5..73031ff 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,7 +8,7 @@
       "name": "pic-cache",
       "version": "0.0.1",
       "devDependencies": {
-        "@cloudflare/workers-types": "^3.14.1",
+        "@cloudflare/workers-types": "^4.20230221.0",
         "@typescript-eslint/eslint-plugin": "^5.36.1",
         "eslint": "^8.22.0",
         "eslint-config-standard-with-typescript": "^22.0.0",
@@ -29,9 +29,9 @@
       }
     },
     "node_modules/@cloudflare/workers-types": {
-      "version": "3.14.1",
-      "resolved": "https://registry.npmjs.org/@cloudflare/workers-types/-/workers-types-3.14.1.tgz",
-      "integrity": "sha512-B1/plF62pt+H2IJHvApK8fdOJAVsvojvacuac8x8s+JIyqbropMyqNqHTKLm3YD8ZFLGwYeFTudU+PQ7vGvBdA==",
+      "version": "4.20230221.0",
+      "resolved": "https://registry.npmjs.org/@cloudflare/workers-types/-/workers-types-4.20230221.0.tgz",
+      "integrity": "sha512-Ge8csuFQMNv3hd8r85PFWv4KV6bHAtKoBaanTkjbbeJS+mizoiBn4OBva0CFQiGfRJklFSGd4OxuCuiK05kogg==",
       "dev": true
     },
     "node_modules/@esbuild-plugins/node-globals-polyfill": {
@@ -3748,9 +3748,9 @@
       }
     },
     "@cloudflare/workers-types": {
-      "version": "3.14.1",
-      "resolved": "https://registry.npmjs.org/@cloudflare/workers-types/-/workers-types-3.14.1.tgz",
-      "integrity": "sha512-B1/plF62pt+H2IJHvApK8fdOJAVsvojvacuac8x8s+JIyqbropMyqNqHTKLm3YD8ZFLGwYeFTudU+PQ7vGvBdA==",
+      "version": "4.20230221.0",
+      "resolved": "https://registry.npmjs.org/@cloudflare/workers-types/-/workers-types-4.20230221.0.tgz",
+      "integrity": "sha512-Ge8csuFQMNv3hd8r85PFWv4KV6bHAtKoBaanTkjbbeJS+mizoiBn4OBva0CFQiGfRJklFSGd4OxuCuiK05kogg==",
       "dev": true
     },
     "@esbuild-plugins/node-globals-polyfill": {
diff --git a/package.json b/package.json
index f184c67..037ad25 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "pic-cache",
   "version": "0.0.1",
   "devDependencies": {
-    "@cloudflare/workers-types": "^3.14.1",
+    "@cloudflare/workers-types": "^4.20230221.0",
     "@typescript-eslint/eslint-plugin": "^5.36.1",
     "eslint": "^8.22.0",
     "eslint-config-standard-with-typescript": "^22.0.0",