diff --git a/infra/cloudfront/main.tf b/infra/cloudfront/main.tf
index d8dc634..6e4e1d7 100644
--- a/infra/cloudfront/main.tf
+++ b/infra/cloudfront/main.tf
@@ -139,7 +139,10 @@ resource "aws_cloudfront_distribution" "cf" {
 
     forwarded_values {
       query_string = false
-      headers      = ["Origin"]
+      headers = [
+        "Origin",
+        "Content-Type"
+      ]
 
       cookies {
         forward = "none"
diff --git a/steps/transform/src/handler/transform.py b/steps/transform/src/handler/transform.py
index 1b5130d..8495320 100644
--- a/steps/transform/src/handler/transform.py
+++ b/steps/transform/src/handler/transform.py
@@ -24,6 +24,7 @@ def transform_report(event, context):
     result = s3.put_object(
         Bucket=website_bucket,
         Key="index.html",
+        ContentType="text/html",
         Body=page.encode(),
     )