diff --git a/renovate.json5 b/renovate.json5
index c19c9f77..7d9ecead 100644
--- a/renovate.json5
+++ b/renovate.json5
@@ -53,4 +53,16 @@
       customChangelogUrl: "https://github.com/charliermarsh/ruff",
     },
   ],
+
+  // https://docs.renovatebot.com/configuration-options/#custommanagers
+  customManagers: [
+    {
+      description: "Update Ruff in Cargo.toml",
+      customType: "regex",
+      fileMatch: ["^Cargo\\.toml$"],
+      matchStrings: ['git = "https:\/\/github.com\/astral-sh\/ruff", tag = "v(?<currentValue>.*?)"'],
+      datasourceTemplate: "pypi",
+      depNameTemplate: "ruff",
+    },
+  ],
 }