diff --git a/config.js b/config.js
index d324141..6eb6db7 100644
--- a/config.js
+++ b/config.js
@@ -11,6 +11,19 @@ module.exports = {
     "minimumReleaseAge": "3 days",
     "labels": ["dependencies"],
     "reviewers": ["lyrathorpe"],
+    "hostRules": [
+        {
+            // Authenticate to the code.emmathe.dev container registry so Renovate can read and
+            // update digests for private images (e.g. code.emmathe.dev/lyrathorpe/whyisthedlrshut.today
+            // and .../docs-site, pinned in the Terraform repo). Token = a Gitea PAT with read:package;
+            // supplied via the RENOVATE_REGISTRY_TOKEN environment variable on the bot (a PAT for
+            // the "lyrathorpe" account with read:package is sufficient; the registry images are its own).
+            "matchHost": "code.emmathe.dev",
+            "hostType": "docker",
+            "username": "lyrathorpe",
+            "password": process.env.RENOVATE_REGISTRY_TOKEN
+        }
+    ],
     "prHourlyLimit": 10,
     "prConcurrentLimit": 10,
     "branchConcurrentLimit": 10,