diff --git a/renovate-shared-config.json b/renovate-shared-config.json
index cac1206..d2bc19c 100644
--- a/renovate-shared-config.json
+++ b/renovate-shared-config.json
@@ -15,10 +15,8 @@
   // where you don't want to burn CI credits, while still keeping your branch
   // in a mergeable state at all times.
   "rebaseWhen": "conflicted",
-  "customManagers": [
+  "regexManagers": [
     {
-      "customType": "regex",
-      "description": "Update ARG version variables in Containerfiles with renovate comments",
       "fileMatch": ["(^|/)Containerfile$", "(^|/)Dockerfile$"],
       "matchStrings": [
         "# renovate: datasource=(?<datasource>[a-z-]+) depName=(?<depName>[^\\s]+)\\s+ARG \\w+version=(?<currentValue>.+)"
@@ -28,9 +26,7 @@
   "packageRules": [
     // Group GitHub Actions dependencies
     {
-      "description": [
-        "GitHub Actions dependencies"
-      ],
+      "description": "GitHub Actions dependencies",
       "matchManagers": [
         "github-actions"
       ],
@@ -39,9 +35,7 @@
     },
     // Group Rust dependencies
     {
-      "description": [
-        "Rust dependencies"
-      ],
+      "description": "Rust dependencies",
       "matchManagers": [
         "cargo"
       ],
@@ -50,9 +44,7 @@
     },
     // Group Docker dependencies
     {
-      "description": [
-        "Docker dependencies"
-      ],
+      "description": "Docker dependencies",
       "matchManagers": [
         "dockerfile",
         "regex"
@@ -62,9 +54,7 @@
     },
     // Disable Containerfile digest pinning
     {
-      "description": [
-        "Containerfile digest pinning"
-      ],
+      "description": "Containerfile digest pinning",
       "matchManagers": [
         "dockerfile"
       ],
@@ -75,9 +65,7 @@
     // This is due to there not being an easy way to tell Renovate which
     // Fedora version is "stable" and which has not been released yet.
     {
-      "description": [
-        "Disable Fedora OCI updates"
-      ],
+      "description": "Disable Fedora OCI updates",
       "matchManagers": [
         "dockerfile",
         "github-actions"