diff --git a/renovate.json b/renovate.json
index c80d79c0ddb1cf9a7ab08917883df7f1bacb3258..b34c4fcee7d2669ff485b90f8f1f19f4914bff71 100644
--- a/renovate.json
+++ b/renovate.json
@@ -34,8 +34,8 @@
   "customManagers": [
     {
       "customType": "regex",
-      "fileMatch": [
-        "^Dockerfile$"
+      "managerFilePatterns": [
+        "/^Dockerfile$/"
       ],
       "matchStrings": [
         "#\\s*renovate:\\s*datasource=(?<datasource>.*?) depName=(?<depName>.*?)( versioning=(?<versioning>.*?))?\\sARG .*?_VERSION=\"(?<currentValue>.*)\"\\s"