# How to configure Contour? (Disable HTTP2)

**URL:** <https://community.replicated.com/t/how-to-configure-contour-disable-http2/697>\
**Category:** How do I?\
**Tags:** kots, kurl\
**Created:** [February 8, 2022, 7:07pm UTC](https://community.replicated.com/t/how-to-configure-contour-disable-http2/697 "2022-02-08T19:07:15Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Spencer\_Elliott](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.replicated.com/spencer_elliott/32/390_2.png) [@Spencer\_Elliott](https://community.replicated.com/u/Spencer_Elliott)\
**Post date:** [February 8, 2022, 7:07pm UTC](https://community.replicated.com/t/how-to-configure-contour-disable-http2/697/1 "2022-02-08T19:07:15Z")

</div>

I’m trying to work around this Safari issue by disabling HTTP2 with the Contour ingress: [https://projectcontour.io/resources/faq/#q-when-i-load-my-site-in-safari-it-shows-me-an-empty-page-developer-tools-show-that-the-http-response-was-421-why-does-this-happen](https://projectcontour.io/resources/faq/#q-when-i-load-my-site-in-safari-it-shows-me-an-empty-page-developer-tools-show-that-the-http-response-was-421-why-does-this-happen)

However, I cannot find a way to customize the Contour config to do this.

I see there’s a configmap defined by kURL which includes a Contour config, given by `kubectl get configmap -n projectcontour contour -o yaml`. I’m not sure if this can be customized beyond the options described on [https://kurl.sh/docs/add-ons/contour](https://kurl.sh/docs/add-ons/contour). Help is appreciated!

Edit: my current workaround is to run these commands on the KOTS node:

```nohighlight
# Get current Contour config
# https://projectcontour.io/docs/main/configuration/
CONTOUR_CONFIG=$(kubectl get configmap -n projectcontour contour -o=jsonpath="{.data['contour\.yaml']}")

# Append configuration to enable HTTP/1.1 only (disable HTTP/2)
CONTOUR_CONFIG+=$'\ndefault-http-versions:\n- HTTP/1.1\n'

# Encode as a literal JSON string
CONTOUR_CONFIG_JSON_STRING=$(echo "$CONTOUR_CONFIG" | jq -Rs .)

# Patch the configmap with the new Contour config
kubectl patch configmap -n projectcontour contour --type="json" -p="[{\"op\": \"replace\", \"path\": \"/data/contour.yaml\", \"value\": ${CONTOUR_CONFIG_JSON_STRING}}]"

# Restart Contour so changes take effect
kubectl rollout restart deployment contour -n projectcontour

```