diff --git a/mcp/package-lock.json b/mcp/package-lock.json
index b047f9fd..eaa6bc1a 100644
--- a/mcp/package-lock.json
+++ b/mcp/package-lock.json
@@ -9,7 +9,7 @@
       "version": "0.1.0",
       "license": "MIT",
       "devDependencies": {
-        "@cloudflare/workers-types": "^5.20260814.1",
+        "@cloudflare/workers-types": "^5.20260821.1",
         "typescript": "^7.0.2",
         "wrangler": "^4.123.0",
         "yaml": "^2.6.0"
@@ -127,9 +127,9 @@
       }
     },
     "node_modules/@cloudflare/workers-types": {
-      "version": "5.20260814.1",
-      "resolved": "https://registry.npmjs.org/@cloudflare/workers-types/-/workers-types-5.20260814.1.tgz",
-      "integrity": "sha512-bF5RT5bmxEaHJR2PRrAmcdf09EPxpRXXzPHcOtjX//r84jZNpwslNwx291ofNdBVuqGV129CBJzxiMYsB37DHw==",
+      "version": "5.20260821.1",
+      "resolved": "https://registry.npmjs.org/@cloudflare/workers-types/-/workers-types-5.20260821.1.tgz",
+      "integrity": "sha512-jZiTISghTPeytJ7eDt5K1AV7df998xGECMgT8oy838VfFLJLROvdLzDaJb0/Jv4WfxO00keNoWt1d6olL7URRg==",
       "dev": true,
       "license": "MIT OR Apache-2.0"
     },
diff --git a/mcp/package.json b/mcp/package.json
index 7e38e46c..267a36b7 100644
--- a/mcp/package.json
+++ b/mcp/package.json
@@ -14,7 +14,7 @@
     "typecheck": "tsc --noEmit"
   },
   "devDependencies": {
-    "@cloudflare/workers-types": "^5.20260814.1",
+    "@cloudflare/workers-types": "^5.20260821.1",
     "typescript": "^7.0.2",
     "wrangler": "^4.123.0",
     "yaml": "^2.6.0"