diff --git a/renovate.json b/renovate.json
index fad92a0..35a6693 100644
--- a/renovate.json
+++ b/renovate.json
@@ -1,15 +1,26 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "extends": ["config:recommended"],
-  "docker": {
-    "pinDigests": true
-  },
+  "extends": [
+    "config:recommended"
+  ],
   "packageRules": [
     {
-      "matchManagers": ["dockerfile"],
-      "matchPackageNames": ["debian"],
+      "matchCategories": [
+        "docker"
+      ],
+      "pinDigests": true
+    },
+    {
+      "matchManagers": [
+        "dockerfile"
+      ],
+      "matchPackageNames": [
+        "debian"
+      ],
       "commitMessageTopic": "debian base image",
-      "schedule": ["at any time"]
+      "schedule": [
+        "at any time"
+      ]
     }
   ]
 }