diff --git a/CHANGELOG.md b/CHANGELOG.md
index 32a7b31..8cb497d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,8 @@ Note: Breaking changes between versions are indicated by "💥".
 
 ## Unreleased
 
+- [Bugfix] Fix auto-renewal of certificates revoked by Let's Encrypt (see [discussion](https://community.letsencrypt.org/t/questions-about-renewing-before-tls-alpn-01-revocations/170449/21)). 
+
 ## v13.1.1 (2022-01-25)
 
 - [Bugfix] Fix authentication in development due to missing SameSite policy on session ID cookie.
diff --git a/tutor/templates/config/defaults.yml b/tutor/templates/config/defaults.yml
index 98d83c7..7632686 100644
--- a/tutor/templates/config/defaults.yml
+++ b/tutor/templates/config/defaults.yml
@@ -11,7 +11,7 @@ DEV_PROJECT_NAME: "{{ TUTOR_APP }}_dev"
 DOCKER_REGISTRY: "docker.io/"
 DOCKER_IMAGE_OPENEDX: "{{ DOCKER_REGISTRY }}overhangio/openedx:{{ TUTOR_VERSION }}"
 DOCKER_IMAGE_OPENEDX_DEV: "openedx-dev"
-DOCKER_IMAGE_CADDY: "docker.io/caddy:2.3.0"
+DOCKER_IMAGE_CADDY: "docker.io/caddy:2.4.6"
 DOCKER_IMAGE_ELASTICSEARCH: "docker.io/elasticsearch:7.10.1"
 DOCKER_IMAGE_MONGODB: "docker.io/mongo:4.2.17"
 DOCKER_IMAGE_MYSQL: "docker.io/mysql:5.7.35"