diff --git a/package-lock.json b/package-lock.json
index 69e243a12..0132aeda2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9381,8 +9381,12 @@
       }
     },
     "node_modules/undici": {
-      "version": "5.9.1",
-      "license": "MIT",
+      "version": "5.11.0",
+      "resolved": "https://registry.npmjs.org/undici/-/undici-5.11.0.tgz",
+      "integrity": "sha512-oWjWJHzFet0Ow4YZBkyiJwiK5vWqEYoH7BINzJAJOLedZ++JpAlCbUktW2GQ2DS2FpKmxD/JMtWUUWl1BtghGw==",
+      "dependencies": {
+        "busboy": "^1.6.0"
+      },
       "engines": {
         "node": ">=12.18"
       }
@@ -9956,7 +9960,7 @@
         "@miniflare/core": "2.11.0",
         "@miniflare/shared": "2.11.0",
         "http-cache-semantics": "^4.1.0",
-        "undici": "5.9.1"
+        "undici": "5.11.0"
       },
       "devDependencies": {
         "@miniflare/shared-test": "2.11.0",
@@ -9998,7 +10002,7 @@
         "dotenv": "^10.0.0",
         "kleur": "^4.1.4",
         "set-cookie-parser": "^2.4.8",
-        "undici": "5.9.1",
+        "undici": "5.11.0",
         "urlpattern-polyfill": "^4.0.3"
       },
       "devDependencies": {
@@ -10037,7 +10041,7 @@
         "@miniflare/core": "2.11.0",
         "@miniflare/shared": "2.11.0",
         "@miniflare/storage-memory": "2.11.0",
-        "undici": "5.9.1"
+        "undici": "5.11.0"
       },
       "devDependencies": {
         "@miniflare/cache": "2.11.0",
@@ -10056,7 +10060,7 @@
         "@miniflare/core": "2.11.0",
         "@miniflare/shared": "2.11.0",
         "html-rewriter-wasm": "^0.4.1",
-        "undici": "5.9.1"
+        "undici": "5.11.0"
       },
       "devDependencies": {
         "@miniflare/shared-test": "2.11.0"
@@ -10075,7 +10079,7 @@
         "@miniflare/web-sockets": "2.11.0",
         "kleur": "^4.1.4",
         "selfsigned": "^2.0.0",
-        "undici": "5.9.1",
+        "undici": "5.11.0",
         "ws": "^8.2.2",
         "youch": "^2.2.2"
       },
@@ -10157,7 +10161,7 @@
         "kleur": "^4.1.4",
         "semiver": "^1.1.0",
         "source-map-support": "^0.5.20",
-        "undici": "5.9.1"
+        "undici": "5.11.0"
       },
       "bin": {
         "miniflare": "bootstrap.js"
@@ -10207,7 +10211,7 @@
       "license": "MIT",
       "dependencies": {
         "@miniflare/shared": "2.11.0",
-        "undici": "5.9.1"
+        "undici": "5.11.0"
       },
       "devDependencies": {
         "@miniflare/shared-test": "2.11.0"
@@ -10410,7 +10414,7 @@
       "dependencies": {
         "@miniflare/core": "2.11.0",
         "@miniflare/shared": "2.11.0",
-        "undici": "5.9.1",
+        "undici": "5.11.0",
         "ws": "^8.2.2"
       },
       "devDependencies": {
@@ -11691,7 +11695,7 @@
         "@miniflare/web-sockets": "2.11.0",
         "@types/http-cache-semantics": "^4.0.1",
         "http-cache-semantics": "^4.1.0",
-        "undici": "5.9.1"
+        "undici": "5.11.0"
       }
     },
     "@miniflare/cli-parser": {
@@ -11722,7 +11726,7 @@
         "dotenv": "^10.0.0",
         "kleur": "^4.1.4",
         "set-cookie-parser": "^2.4.8",
-        "undici": "5.9.1",
+        "undici": "5.11.0",
         "urlpattern-polyfill": "^4.0.3"
       }
     },
@@ -11743,7 +11747,7 @@
         "@miniflare/shared": "2.11.0",
         "@miniflare/shared-test": "2.11.0",
         "@miniflare/storage-memory": "2.11.0",
-        "undici": "5.9.1"
+        "undici": "5.11.0"
       }
     },
     "@miniflare/html-rewriter": {
@@ -11753,7 +11757,7 @@
         "@miniflare/shared": "2.11.0",
         "@miniflare/shared-test": "2.11.0",
         "html-rewriter-wasm": "^0.4.1",
-        "undici": "5.9.1"
+        "undici": "5.11.0"
       }
     },
     "@miniflare/http-server": {
@@ -11766,7 +11770,7 @@
         "@types/node-forge": "^0.10.4",
         "kleur": "^4.1.4",
         "selfsigned": "^2.0.0",
-        "undici": "5.9.1",
+        "undici": "5.11.0",
         "ws": "^8.2.2",
         "youch": "^2.2.2"
       }
@@ -11790,7 +11794,7 @@
       "requires": {
         "@miniflare/shared": "2.11.0",
         "@miniflare/shared-test": "2.11.0",
-        "undici": "5.9.1"
+        "undici": "5.11.0"
       }
     },
     "@miniflare/runner-vm": {
@@ -11899,7 +11903,7 @@
         "@miniflare/shared": "2.11.0",
         "@miniflare/shared-test": "2.11.0",
         "@types/ws": "^8.2.0",
-        "undici": "5.9.1",
+        "undici": "5.11.0",
         "ws": "^8.2.2"
       }
     },
@@ -15147,7 +15151,7 @@
         "open": "^8.4.0",
         "semiver": "^1.1.0",
         "source-map-support": "^0.5.20",
-        "undici": "5.9.1"
+        "undici": "5.11.0"
       }
     },
     "minimatch": {
@@ -16660,7 +16664,12 @@
       }
     },
     "undici": {
-      "version": "5.9.1"
+      "version": "5.11.0",
+      "resolved": "https://registry.npmjs.org/undici/-/undici-5.11.0.tgz",
+      "integrity": "sha512-oWjWJHzFet0Ow4YZBkyiJwiK5vWqEYoH7BINzJAJOLedZ++JpAlCbUktW2GQ2DS2FpKmxD/JMtWUUWl1BtghGw==",
+      "requires": {
+        "busboy": "^1.6.0"
+      }
     },
     "unique-string": {
       "version": "2.0.0",
diff --git a/packages/cache/package.json b/packages/cache/package.json
index 03b51b9a0..495ba889f 100644
--- a/packages/cache/package.json
+++ b/packages/cache/package.json
@@ -38,7 +38,7 @@
     "@miniflare/core": "2.11.0",
     "@miniflare/shared": "2.11.0",
     "http-cache-semantics": "^4.1.0",
-    "undici": "5.9.1"
+    "undici": "5.11.0"
   },
   "devDependencies": {
     "@miniflare/shared-test": "2.11.0",
diff --git a/packages/core/package.json b/packages/core/package.json
index 45c99cf6c..aaf22ead8 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -46,7 +46,7 @@
     "dotenv": "^10.0.0",
     "kleur": "^4.1.4",
     "set-cookie-parser": "^2.4.8",
-    "undici": "5.9.1",
+    "undici": "5.11.0",
     "urlpattern-polyfill": "^4.0.3"
   },
   "devDependencies": {
diff --git a/packages/durable-objects/package.json b/packages/durable-objects/package.json
index 4ad5388f2..807bdabb4 100644
--- a/packages/durable-objects/package.json
+++ b/packages/durable-objects/package.json
@@ -38,7 +38,7 @@
     "@miniflare/core": "2.11.0",
     "@miniflare/shared": "2.11.0",
     "@miniflare/storage-memory": "2.11.0",
-    "undici": "5.9.1"
+    "undici": "5.11.0"
   },
   "devDependencies": {
     "@miniflare/cache": "2.11.0",
diff --git a/packages/html-rewriter/package.json b/packages/html-rewriter/package.json
index 8acb97059..2ba4357ea 100644
--- a/packages/html-rewriter/package.json
+++ b/packages/html-rewriter/package.json
@@ -38,7 +38,7 @@
     "@miniflare/core": "2.11.0",
     "@miniflare/shared": "2.11.0",
     "html-rewriter-wasm": "^0.4.1",
-    "undici": "5.9.1"
+    "undici": "5.11.0"
   },
   "devDependencies": {
     "@miniflare/shared-test": "2.11.0"
diff --git a/packages/http-server/package.json b/packages/http-server/package.json
index bb44c7c0e..16218fc0e 100644
--- a/packages/http-server/package.json
+++ b/packages/http-server/package.json
@@ -40,7 +40,7 @@
     "@miniflare/web-sockets": "2.11.0",
     "kleur": "^4.1.4",
     "selfsigned": "^2.0.0",
-    "undici": "5.9.1",
+    "undici": "5.11.0",
     "ws": "^8.2.2",
     "youch": "^2.2.2"
   },
diff --git a/packages/miniflare/package.json b/packages/miniflare/package.json
index 9eb798260..910c249af 100644
--- a/packages/miniflare/package.json
+++ b/packages/miniflare/package.json
@@ -66,7 +66,7 @@
     "kleur": "^4.1.4",
     "semiver": "^1.1.0",
     "source-map-support": "^0.5.20",
-    "undici": "5.9.1"
+    "undici": "5.11.0"
   },
   "devDependencies": {
     "@miniflare/shared-test": "2.11.0",
diff --git a/packages/r2/package.json b/packages/r2/package.json
index 0efc10de6..bc8dda3d7 100644
--- a/packages/r2/package.json
+++ b/packages/r2/package.json
@@ -36,7 +36,7 @@
   },
   "dependencies": {
     "@miniflare/shared": "2.11.0",
-    "undici": "5.9.1"
+    "undici": "5.11.0"
   },
   "devDependencies": {
     "@miniflare/shared-test": "2.11.0"
diff --git a/packages/web-sockets/package.json b/packages/web-sockets/package.json
index f9cc6fb27..0a555453e 100644
--- a/packages/web-sockets/package.json
+++ b/packages/web-sockets/package.json
@@ -37,7 +37,7 @@
   "dependencies": {
     "@miniflare/core": "2.11.0",
     "@miniflare/shared": "2.11.0",
-    "undici": "5.9.1",
+    "undici": "5.11.0",
     "ws": "^8.2.2"
   },
   "devDependencies": {