diff --git a/src/jvmMain/kotlin/nl/astraeus/tmpl/web/RequestHandler.kt b/src/jvmMain/kotlin/nl/astraeus/tmpl/web/RequestHandler.kt
index 04f514d..3a45b08 100644
--- a/src/jvmMain/kotlin/nl/astraeus/tmpl/web/RequestHandler.kt
+++ b/src/jvmMain/kotlin/nl/astraeus/tmpl/web/RequestHandler.kt
@@ -5,12 +5,14 @@ import io.undertow.server.HttpServerExchange
 import io.undertow.server.handlers.PathHandler
 import io.undertow.server.handlers.resource.PathResourceManager
 import io.undertow.server.handlers.resource.ResourceHandler
+import io.undertow.util.Headers
 import nl.astraeus.tmpl.itemUrl
 import java.nio.file.Paths
 import kotlin.text.startsWith
 
 object IndexHandler : HttpHandler {
   override fun handleRequest(exchange: HttpServerExchange) {
+    exchange.responseHeaders.put(Headers.CONTENT_TYPE, "text/html")
     if (exchange.requestPath.startsWith("/$itemUrl/")) {
       exchange.responseSender.send(generateIndex(null))
     } else {