diff --git a/.github/renovate.json5 b/.github/renovate.json5
index 03827e5..48f427e 100644
--- a/.github/renovate.json5
+++ b/.github/renovate.json5
@@ -40,7 +40,7 @@
   customManagers: [
     {
       customType: "regex",
-      fileMatch: ["\.rb$", "^Rakefile$"],
+      managerFilePatterns: ["/.rb$/", "/^Rakefile$/"],
       matchStrings: [
         "renovate: datasource=(?<datasource>.*?) depName=(?<depName>.*?)\\s.*_version = '(?<currentValue>.*)'\\s"
       ]