diff --git a/.github/renovate.json5 b/.github/renovate.json5
index cf0982b..bede996 100644
--- a/.github/renovate.json5
+++ b/.github/renovate.json5
@@ -89,8 +89,8 @@
   customManagers: [
     {
       customType: 'regex',
-      fileMatch: [
-        '^rust-toolchain(\\.toml)?$',
+      managerFilePatterns: [
+        '/^rust-toolchain(\\.toml)?$/',
       ],
       matchStrings: [
         'channel\\s*=\\s*"(?<currentValue>\\d+\\.\\d+\\.\\d+)"',