diff --git a/Containerfile b/Containerfile
index cf4b025..2dbe50b 100644
--- a/Containerfile
+++ b/Containerfile
@@ -1,4 +1,4 @@
-FROM docker.io/mgoltzsche/podman:4.9-minimal
+FROM docker.io/mgoltzsche/podman:5.4-minimal
 
 RUN apk add --update --no-cache bash git nodejs python3 py3-pip ca-certificates
 RUN pip3 install pre-commit --break-system-packages
diff --git a/README.md b/README.md
index 2d1f8fc..259e60d 100644
--- a/README.md
+++ b/README.md
@@ -7,3 +7,12 @@ environment.
 ```
 registry.garrity.co:8443/gs/ci-containers:latest
 ```
+
+## Updating the Certificate
+
+The registry has a one year expiry:
+
+```
+scp pfm@registry.garrity.co:~/certs/domain.crt ./registry.garrity.co.crt
+sudo cp registry.garrity.co.crt /usr/local/share/ca-certificates/registry.garrity.co.crt
+```
diff --git a/registry.garrity.co.crt b/registry.garrity.co.crt
index a74fcba..cada28c 100644
--- a/registry.garrity.co.crt
+++ b/registry.garrity.co.crt
@@ -1,35 +1,35 @@
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----