diff --git a/.changeset/six-birds-tell.md b/.changeset/six-birds-tell.md
new file mode 100644
index 0000000..8234ed0
--- /dev/null
+++ b/.changeset/six-birds-tell.md
@@ -0,0 +1,5 @@
+---
+'esbd': patch
+---
+
+Add Content-Type header to static responses
diff --git a/packages/esbd/package.json b/packages/esbd/package.json
index c9212f3..b022cc0 100644
--- a/packages/esbd/package.json
+++ b/packages/esbd/package.json
@@ -29,7 +29,7 @@
   "devDependencies": {
     "@playwright/test": "^1.35.1",
     "@types/pretty-time": "^1.1.2",
-    "@types/serve-static": "^1.15.2",
+    "@types/serve-static": "~1.13.0",
     "@types/wait-on": "^5.3.1",
     "cleye": "^1.3.2",
     "esbuild": "^0.18.11",
diff --git a/packages/esbd/src/esbd-serve.ts b/packages/esbd/src/esbd-serve.ts
index 6bce892..18b4066 100644
--- a/packages/esbd/src/esbd-serve.ts
+++ b/packages/esbd/src/esbd-serve.ts
@@ -174,8 +174,17 @@ export default async function esbdServe(
     },
   });
 
-  const outputHandler = serveStatic(absOutDir, { fallthrough: false });
-  const servedirHandler = servedir ? serveStatic(servedir, { fallthrough: true }) : undefined;
+  const setHeaders: serveStatic.ServeStaticOptions['setHeaders'] = (res, path) => {
+    if (res.hasHeader('content-type')) return;
+
+    const contentType = serveStatic.mime.lookup(path);
+    if (contentType) res.setHeader('content-type', contentType);
+  };
+
+  const outputHandler = serveStatic(absOutDir, { fallthrough: false, setHeaders });
+  const servedirHandler = servedir
+    ? serveStatic(servedir, { fallthrough: true, setHeaders })
+    : undefined;
 
   const staticHandler: ReturnType<typeof serveStatic> = servedirHandler
     ? (req, res, next) => servedirHandler(req, res, () => outputHandler(req, res, next))
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index debc72c..a5c069b 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -51,7 +51,7 @@ importers:
       '@jgoz/esbuild-plugin-typecheck': workspace:*
       '@playwright/test': ^1.35.1
       '@types/pretty-time': ^1.1.2
-      '@types/serve-static': ^1.15.2
+      '@types/serve-static': ~1.13.0
       '@types/wait-on': ^5.3.1
       cleye: ^1.3.2
       esbuild: ^0.18.11
@@ -79,7 +79,7 @@ importers:
     devDependencies:
       '@playwright/test': 1.35.1
       '@types/pretty-time': 1.1.2
-      '@types/serve-static': 1.15.2
+      '@types/serve-static': 1.13.10
       '@types/wait-on': 5.3.1
       cleye: 1.3.2
       esbuild: 0.18.11
@@ -2102,10 +2102,6 @@ packages:
       '@types/node': 16.18.11
     dev: true
 
-  /@types/http-errors/2.0.1:
-    resolution: {integrity: sha512-/K3ds8TRAfBvi5vfjuz8y6+GiAYBZ0x4tXv1Av6CWBWn0IlADc+ZX9pMq7oU0fNQPnBwIZl3rmeLp6SBApbxSQ==}
-    dev: true
-
   /@types/is-ci/3.0.0:
     resolution: {integrity: sha512-Q0Op0hdWbYd1iahB+IFNQcWXFq4O0Q5MwQP7uN0souuQ4rPg1vEYcnIOfr1gY+M+6rc8FGoRaBO1mOOvL29sEQ==}
     dependencies:
@@ -2140,8 +2136,8 @@ packages:
     resolution: {integrity: sha512-dRLjCWHYg4oaA77cxO64oO+7JwCwnIzkZPdrrC71jQmQtlhM556pwKo5bUzqvZndkVbeFLIIi+9TC40JNF5hNQ==}
     dev: true
 
-  /@types/mime/3.0.1:
-    resolution: {integrity: sha512-Y4XFY5VJAuw0FgAqPNd6NNoV44jbq9Bz2L7Rh/J6jLTiHBSBJa9fxqQIvkIld4GsoDOcCbvzOUAbLPsSKKg+uA==}
+  /@types/mime/1.3.2:
+    resolution: {integrity: sha512-YATxVxgRqNH6nHEIsvg6k2Boc1JHI9ZbH5iWFFv/MTkchz3b1ieGDa5T0a9RznNdI0KhVbdbWSN+KWWrQZRxTw==}
     dev: true
 
   /@types/minimist/1.2.2:
@@ -2185,12 +2181,11 @@ packages:
     resolution: {integrity: sha512-G8hZ6XJiHnuhQKR7ZmysCeJWE08o8T0AXtk5darsCaTVsYZhhgUrq53jizaR2FvsoeCwJhlmwTjkXBY5Pn/ZHw==}
     dev: true
 
-  /@types/serve-static/1.15.2:
-    resolution: {integrity: sha512-J2LqtvFYCzaj8pVYKw8klQXrLLk7TBZmQ4ShlcdkELFKGwGMfevMLneMMRkMgZxotOD9wg497LpC7O8PcvAmfw==}
+  /@types/serve-static/1.13.10:
+    resolution: {integrity: sha512-nCkHGI4w7ZgAdNkrEu0bv+4xNV/XDqW+DydknebMOQwkpDGx8G+HTlj7R7ABI8i8nKxVw0wtKPi1D+lPOkh4YQ==}
     dependencies:
-      '@types/http-errors': 2.0.1
-      '@types/mime': 3.0.1
-      '@types/node': 20.3.3
+      '@types/mime': 1.3.2
+      '@types/node': 16.18.11
     dev: true
 
   /@types/stack-utils/2.0.1: