diff --git a/renovate.json b/renovate.json
index 36162ef..b67362b 100644
--- a/renovate.json
+++ b/renovate.json
@@ -3,10 +3,13 @@
   "extends": [
     "config:recommended"
   ],
-  "regexManagers": [
+  "customManagers": [
     {
+      "customType": "regex",
       "description": "Update VERSION variables in Dockerfiles",
-      "fileMatch": ["^Dockerfile$"],
+      "fileMatch": [
+        "^Dockerfile$"
+      ],
       "matchStrings": [
         "# renovate: datasource=(?<datasource>[a-z-]+?) depName=(?<depName>.+?)(?: versioning=(?<versioning>[a-z-]+?))?\\s(?:ENV|ARG) .+?_VERSION=\"(?<currentValue>.+?)\"\\s",
         "# renovate: datasource=(?<datasource>[a-z-]+?) depName=(?<depName>.+?)(?: versioning=(?<versioning>[a-z-]+?))?\\s(?:ENV|ARG) VERSION=\"(?<currentValue>.+?)\"\\s"
@@ -14,4 +17,4 @@
       "versioningTemplate": "{{#if versioning}}{{versioning}}{{else}}semver{{/if}}"
     }
   ]
-}
\ No newline at end of file
+}