diff --git a/src/Dockerfile b/src/Dockerfile
index bfa1ace..6689052 100644
--- a/src/Dockerfile
+++ b/src/Dockerfile
@@ -18,6 +18,7 @@ ENV CERTBOT_DNS_AUTHENTICATORS="\
     ionos \
     bunny \
     duckdns \
+    hetzner \
     "
 
 # Needed in order to install Python packages via PIP after PEP 668 was
diff --git a/src/Dockerfile-alpine b/src/Dockerfile-alpine
index 9fad1e8..843de00 100644
--- a/src/Dockerfile-alpine
+++ b/src/Dockerfile-alpine
@@ -18,6 +18,7 @@ ENV CERTBOT_DNS_AUTHENTICATORS="\
     ionos \
     bunny \
     duckdns \
+    hetzner \
     "
 
 # Needed in order to install Python packages via PIP after PEP 668 was