diff --git a/.changeset/spicy-ties-matter.md b/.changeset/spicy-ties-matter.md
deleted file mode 100644
index 48173596af10..000000000000
--- a/.changeset/spicy-ties-matter.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-'astro': patch
----
-
-Fixes an issue where the dev server returns a 404 status code when a user middleware returns a valid `Response`.
diff --git a/examples/basics/package.json b/examples/basics/package.json
index 9c64cd2b8bc0..bb6ca0e5dbfa 100644
--- a/examples/basics/package.json
+++ b/examples/basics/package.json
@@ -11,6 +11,6 @@
     "astro": "astro"
   },
   "dependencies": {
-    "astro": "^4.16.11"
+    "astro": "^4.16.12"
   }
 }
diff --git a/examples/blog/package.json b/examples/blog/package.json
index 3207e29547ef..d7e3755bfb21 100644
--- a/examples/blog/package.json
+++ b/examples/blog/package.json
@@ -14,6 +14,6 @@
     "@astrojs/mdx": "^3.1.9",
     "@astrojs/rss": "^4.0.9",
     "@astrojs/sitemap": "^3.2.1",
-    "astro": "^4.16.11"
+    "astro": "^4.16.12"
   }
 }
diff --git a/examples/component/package.json b/examples/component/package.json
index 00b21725de4c..bef28130fe32 100644
--- a/examples/component/package.json
+++ b/examples/component/package.json
@@ -15,7 +15,7 @@
   ],
   "scripts": {},
   "devDependencies": {
-    "astro": "^4.16.11"
+    "astro": "^4.16.12"
   },
   "peerDependencies": {
     "astro": "^4.0.0"
diff --git a/examples/container-with-vitest/package.json b/examples/container-with-vitest/package.json
index 209517b3c109..a67eefdad308 100644
--- a/examples/container-with-vitest/package.json
+++ b/examples/container-with-vitest/package.json
@@ -12,7 +12,7 @@
     "test": "vitest run"
   },
   "dependencies": {
-    "astro": "^4.16.11",
+    "astro": "^4.16.12",
     "@astrojs/react": "^3.6.2",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
diff --git a/examples/framework-alpine/package.json b/examples/framework-alpine/package.json
index 7216c73d14fb..f9d0bf2340e6 100644
--- a/examples/framework-alpine/package.json
+++ b/examples/framework-alpine/package.json
@@ -14,6 +14,6 @@
     "@astrojs/alpinejs": "^0.4.0",
     "@types/alpinejs": "^3.13.10",
     "alpinejs": "^3.14.3",
-    "astro": "^4.16.11"
+    "astro": "^4.16.12"
   }
 }
diff --git a/examples/framework-lit/package.json b/examples/framework-lit/package.json
index c57bfb792c25..66730f1ad759 100644
--- a/examples/framework-lit/package.json
+++ b/examples/framework-lit/package.json
@@ -13,7 +13,7 @@
   "dependencies": {
     "@astrojs/lit": "^4.3.0",
     "@webcomponents/template-shadowroot": "^0.2.1",
-    "astro": "^4.16.11",
+    "astro": "^4.16.12",
     "lit": "^3.2.1"
   }
 }
diff --git a/examples/framework-multiple/package.json b/examples/framework-multiple/package.json
index ae33ce0cffb9..1e63e0247928 100644
--- a/examples/framework-multiple/package.json
+++ b/examples/framework-multiple/package.json
@@ -18,7 +18,7 @@
     "@astrojs/vue": "^4.5.2",
     "@types/react": "^18.3.12",
     "@types/react-dom": "^18.3.1",
-    "astro": "^4.16.11",
+    "astro": "^4.16.12",
     "preact": "^10.24.3",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
diff --git a/examples/framework-preact/package.json b/examples/framework-preact/package.json
index 6ab39cf91ed2..075f2287c9d8 100644
--- a/examples/framework-preact/package.json
+++ b/examples/framework-preact/package.json
@@ -13,7 +13,7 @@
   "dependencies": {
     "@astrojs/preact": "^3.5.3",
     "@preact/signals": "^1.3.0",
-    "astro": "^4.16.11",
+    "astro": "^4.16.12",
     "preact": "^10.24.3"
   }
 }
diff --git a/examples/framework-react/package.json b/examples/framework-react/package.json
index f1e5c4f217c1..607ffdf2e64a 100644
--- a/examples/framework-react/package.json
+++ b/examples/framework-react/package.json
@@ -14,7 +14,7 @@
     "@astrojs/react": "^3.6.2",
     "@types/react": "^18.3.12",
     "@types/react-dom": "^18.3.1",
-    "astro": "^4.16.11",
+    "astro": "^4.16.12",
     "react": "^18.3.1",
     "react-dom": "^18.3.1"
   }
diff --git a/examples/framework-solid/package.json b/examples/framework-solid/package.json
index 5565c2ccf01a..4445b4a102d7 100644
--- a/examples/framework-solid/package.json
+++ b/examples/framework-solid/package.json
@@ -12,7 +12,7 @@
   },
   "dependencies": {
     "@astrojs/solid-js": "^4.4.2",
-    "astro": "^4.16.11",
+    "astro": "^4.16.12",
     "solid-js": "^1.9.3"
   }
 }
diff --git a/examples/framework-svelte/package.json b/examples/framework-svelte/package.json
index 1f29535e7511..9c1adf7cf9c6 100644
--- a/examples/framework-svelte/package.json
+++ b/examples/framework-svelte/package.json
@@ -12,7 +12,7 @@
   },
   "dependencies": {
     "@astrojs/svelte": "^5.7.3",
-    "astro": "^4.16.11",
+    "astro": "^4.16.12",
     "svelte": "^4.2.19"
   }
 }
diff --git a/examples/framework-vue/package.json b/examples/framework-vue/package.json
index a5e7b2689586..6f958985a460 100644
--- a/examples/framework-vue/package.json
+++ b/examples/framework-vue/package.json
@@ -12,7 +12,7 @@
   },
   "dependencies": {
     "@astrojs/vue": "^4.5.2",
-    "astro": "^4.16.11",
+    "astro": "^4.16.12",
     "vue": "^3.5.12"
   }
 }
diff --git a/examples/hackernews/package.json b/examples/hackernews/package.json
index ebfff074be9c..da868174d01c 100644
--- a/examples/hackernews/package.json
+++ b/examples/hackernews/package.json
@@ -12,6 +12,6 @@
   },
   "dependencies": {
     "@astrojs/node": "^8.3.4",
-    "astro": "^4.16.11"
+    "astro": "^4.16.12"
   }
 }
diff --git a/examples/integration/package.json b/examples/integration/package.json
index 846ac11773ab..86bfeaa8decd 100644
--- a/examples/integration/package.json
+++ b/examples/integration/package.json
@@ -15,7 +15,7 @@
   ],
   "scripts": {},
   "devDependencies": {
-    "astro": "^4.16.11"
+    "astro": "^4.16.12"
   },
   "peerDependencies": {
     "astro": "^4.0.0"
diff --git a/examples/minimal/package.json b/examples/minimal/package.json
index 9c01f84ee732..3af139efdc3c 100644
--- a/examples/minimal/package.json
+++ b/examples/minimal/package.json
@@ -11,6 +11,6 @@
     "astro": "astro"
   },
   "dependencies": {
-    "astro": "^4.16.11"
+    "astro": "^4.16.12"
   }
 }
diff --git a/examples/portfolio/package.json b/examples/portfolio/package.json
index f20d2eae917f..02c2c8384e2e 100644
--- a/examples/portfolio/package.json
+++ b/examples/portfolio/package.json
@@ -11,6 +11,6 @@
     "astro": "astro"
   },
   "dependencies": {
-    "astro": "^4.16.11"
+    "astro": "^4.16.12"
   }
 }
diff --git a/examples/ssr/package.json b/examples/ssr/package.json
index e79a746c4591..6d937bf2f408 100644
--- a/examples/ssr/package.json
+++ b/examples/ssr/package.json
@@ -14,7 +14,7 @@
   "dependencies": {
     "@astrojs/node": "^8.3.4",
     "@astrojs/svelte": "^5.7.3",
-    "astro": "^4.16.11",
+    "astro": "^4.16.12",
     "svelte": "^4.2.19"
   }
 }
diff --git a/examples/starlog/package.json b/examples/starlog/package.json
index df175b24ff04..cf9aee8bad53 100644
--- a/examples/starlog/package.json
+++ b/examples/starlog/package.json
@@ -10,7 +10,7 @@
     "astro": "astro"
   },
   "dependencies": {
-    "astro": "^4.16.11",
+    "astro": "^4.16.12",
     "sass": "^1.80.6",
     "sharp": "^0.33.3"
   }
diff --git a/examples/toolbar-app/package.json b/examples/toolbar-app/package.json
index 1dc223fa6628..e8a23892ec5e 100644
--- a/examples/toolbar-app/package.json
+++ b/examples/toolbar-app/package.json
@@ -15,6 +15,6 @@
     "./app": "./dist/app.js"
   },
   "devDependencies": {
-    "astro": "^4.16.11"
+    "astro": "^4.16.12"
   }
 }
diff --git a/examples/with-markdoc/package.json b/examples/with-markdoc/package.json
index ebe40b589520..bca2443b1c2c 100644
--- a/examples/with-markdoc/package.json
+++ b/examples/with-markdoc/package.json
@@ -12,6 +12,6 @@
   },
   "dependencies": {
     "@astrojs/markdoc": "^0.11.5",
-    "astro": "^4.16.11"
+    "astro": "^4.16.12"
   }
 }
diff --git a/examples/with-mdx/package.json b/examples/with-mdx/package.json
index 8f486fb801f1..70ba88b2fbb1 100644
--- a/examples/with-mdx/package.json
+++ b/examples/with-mdx/package.json
@@ -13,7 +13,7 @@
   "dependencies": {
     "@astrojs/mdx": "^3.1.9",
     "@astrojs/preact": "^3.5.3",
-    "astro": "^4.16.11",
+    "astro": "^4.16.12",
     "preact": "^10.24.3"
   }
 }
diff --git a/examples/with-nanostores/package.json b/examples/with-nanostores/package.json
index 759a8e5e1cd5..557adbaf1445 100644
--- a/examples/with-nanostores/package.json
+++ b/examples/with-nanostores/package.json
@@ -13,7 +13,7 @@
   "dependencies": {
     "@astrojs/preact": "^3.5.3",
     "@nanostores/preact": "^0.5.2",
-    "astro": "^4.16.11",
+    "astro": "^4.16.12",
     "nanostores": "^0.11.3",
     "preact": "^10.24.3"
   }
diff --git a/examples/with-tailwindcss/package.json b/examples/with-tailwindcss/package.json
index 4d8860e94a7e..901f494c6546 100644
--- a/examples/with-tailwindcss/package.json
+++ b/examples/with-tailwindcss/package.json
@@ -14,7 +14,7 @@
     "@astrojs/mdx": "^3.1.9",
     "@astrojs/tailwind": "^5.1.2",
     "@types/canvas-confetti": "^1.6.4",
-    "astro": "^4.16.11",
+    "astro": "^4.16.12",
     "autoprefixer": "^10.4.20",
     "canvas-confetti": "^1.9.3",
     "postcss": "^8.4.47",
diff --git a/examples/with-vitest/package.json b/examples/with-vitest/package.json
index 7778c8de2c9b..21ca1eac0a06 100644
--- a/examples/with-vitest/package.json
+++ b/examples/with-vitest/package.json
@@ -12,7 +12,7 @@
     "test": "vitest"
   },
   "dependencies": {
-    "astro": "^4.16.11",
+    "astro": "^4.16.12",
     "vitest": "^2.1.4"
   }
 }
diff --git a/packages/astro/CHANGELOG.md b/packages/astro/CHANGELOG.md
index 50d2f4263142..87d6178e1b2e 100644
--- a/packages/astro/CHANGELOG.md
+++ b/packages/astro/CHANGELOG.md
@@ -1,5 +1,11 @@
 # astro
 
+## 4.16.12
+
+### Patch Changes
+
+- [#12420](https://github.com/withastro/astro/pull/12420) [`acac0af`](https://github.com/withastro/astro/commit/acac0af53466f8a381ccdac29ed2ad735d7b4e79) Thanks [@ematipico](https://github.com/ematipico)! - Fixes an issue where the dev server returns a 404 status code when a user middleware returns a valid `Response`.
+
 ## 4.16.11
 
 ### Patch Changes
diff --git a/packages/astro/package.json b/packages/astro/package.json
index 4534f1ce057b..e7ddcb616e6e 100644
--- a/packages/astro/package.json
+++ b/packages/astro/package.json
@@ -1,6 +1,6 @@
 {
   "name": "astro",
-  "version": "4.16.11",
+  "version": "4.16.12",
   "description": "Astro is a modern site builder with web best practices, performance, and DX front-of-mind.",
   "type": "module",
   "author": "withastro",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 3d5ed93de55d..ea794e1bff92 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -139,7 +139,7 @@ importers:
   examples/basics:
     dependencies:
       astro:
-        specifier: ^4.16.11
+        specifier: ^4.16.12
         version: link:../../packages/astro
 
   examples/blog:
@@ -154,13 +154,13 @@ importers:
         specifier: ^3.2.1
         version: link:../../packages/integrations/sitemap
       astro:
-        specifier: ^4.16.11
+        specifier: ^4.16.12
         version: link:../../packages/astro
 
   examples/component:
     devDependencies:
       astro:
-        specifier: ^4.16.11
+        specifier: ^4.16.12
         version: link:../../packages/astro
 
   examples/container-with-vitest:
@@ -169,7 +169,7 @@ importers:
         specifier: ^3.6.2
         version: link:../../packages/integrations/react
       astro:
-        specifier: ^4.16.11
+        specifier: ^4.16.12
         version: link:../../packages/astro
       react:
         specifier: ^18.3.1
@@ -200,7 +200,7 @@ importers:
         specifier: ^3.14.3
         version: 3.14.3
       astro:
-        specifier: ^4.16.11
+        specifier: ^4.16.12
         version: link:../../packages/astro
 
   examples/framework-lit:
@@ -212,7 +212,7 @@ importers:
         specifier: ^0.2.1
         version: 0.2.1
       astro:
-        specifier: ^4.16.11
+        specifier: ^4.16.12
         version: link:../../packages/astro
       lit:
         specifier: ^3.2.1
@@ -242,7 +242,7 @@ importers:
         specifier: ^18.3.1
         version: 18.3.1
       astro:
-        specifier: ^4.16.11
+        specifier: ^4.16.12
         version: link:../../packages/astro
       preact:
         specifier: ^10.24.3
@@ -272,7 +272,7 @@ importers:
         specifier: ^1.3.0
         version: 1.3.0(preact@10.24.3)
       astro:
-        specifier: ^4.16.11
+        specifier: ^4.16.12
         version: link:../../packages/astro
       preact:
         specifier: ^10.24.3
@@ -290,7 +290,7 @@ importers:
         specifier: ^18.3.1
         version: 18.3.1
       astro:
-        specifier: ^4.16.11
+        specifier: ^4.16.12
         version: link:../../packages/astro
       react:
         specifier: ^18.3.1
@@ -305,7 +305,7 @@ importers:
         specifier: ^4.4.2
         version: link:../../packages/integrations/solid
       astro:
-        specifier: ^4.16.11
+        specifier: ^4.16.12
         version: link:../../packages/astro
       solid-js:
         specifier: ^1.9.3
@@ -317,7 +317,7 @@ importers:
         specifier: ^5.7.3
         version: link:../../packages/integrations/svelte
       astro:
-        specifier: ^4.16.11
+        specifier: ^4.16.12
         version: link:../../packages/astro
       svelte:
         specifier: ^4.2.19
@@ -329,7 +329,7 @@ importers:
         specifier: ^4.5.2
         version: link:../../packages/integrations/vue
       astro:
-        specifier: ^4.16.11
+        specifier: ^4.16.12
         version: link:../../packages/astro
       vue:
         specifier: ^3.5.12
@@ -341,25 +341,25 @@ importers:
         specifier: ^8.3.4
         version: 8.3.4(astro@packages+astro)
       astro:
-        specifier: ^4.16.11
+        specifier: ^4.16.12
         version: link:../../packages/astro
 
   examples/integration:
     devDependencies:
       astro:
-        specifier: ^4.16.11
+        specifier: ^4.16.12
         version: link:../../packages/astro
 
   examples/minimal:
     dependencies:
       astro:
-        specifier: ^4.16.11
+        specifier: ^4.16.12
         version: link:../../packages/astro
 
   examples/portfolio:
     dependencies:
       astro:
-        specifier: ^4.16.11
+        specifier: ^4.16.12
         version: link:../../packages/astro
 
   examples/ssr:
@@ -371,7 +371,7 @@ importers:
         specifier: ^5.7.3
         version: link:../../packages/integrations/svelte
       astro:
-        specifier: ^4.16.11
+        specifier: ^4.16.12
         version: link:../../packages/astro
       svelte:
         specifier: ^4.2.19
@@ -380,7 +380,7 @@ importers:
   examples/starlog:
     dependencies:
       astro:
-        specifier: ^4.16.11
+        specifier: ^4.16.12
         version: link:../../packages/astro
       sass:
         specifier: ^1.80.6
@@ -392,7 +392,7 @@ importers:
   examples/toolbar-app:
     devDependencies:
       astro:
-        specifier: ^4.16.11
+        specifier: ^4.16.12
         version: link:../../packages/astro
 
   examples/with-markdoc:
@@ -401,7 +401,7 @@ importers:
         specifier: ^0.11.5
         version: link:../../packages/integrations/markdoc
       astro:
-        specifier: ^4.16.11
+        specifier: ^4.16.12
         version: link:../../packages/astro
 
   examples/with-mdx:
@@ -413,7 +413,7 @@ importers:
         specifier: ^3.5.3
         version: link:../../packages/integrations/preact
       astro:
-        specifier: ^4.16.11
+        specifier: ^4.16.12
         version: link:../../packages/astro
       preact:
         specifier: ^10.24.3
@@ -428,7 +428,7 @@ importers:
         specifier: ^0.5.2
         version: 0.5.2(nanostores@0.11.3)(preact@10.24.3)
       astro:
-        specifier: ^4.16.11
+        specifier: ^4.16.12
         version: link:../../packages/astro
       nanostores:
         specifier: ^0.11.3
@@ -449,7 +449,7 @@ importers:
         specifier: ^1.6.4
         version: 1.6.4
       astro:
-        specifier: ^4.16.11
+        specifier: ^4.16.12
         version: link:../../packages/astro
       autoprefixer:
         specifier: ^10.4.20
@@ -467,7 +467,7 @@ importers:
   examples/with-vitest:
     dependencies:
       astro:
-        specifier: ^4.16.11
+        specifier: ^4.16.12
         version: link:../../packages/astro
       vitest:
         specifier: ^2.1.4