diff --git a/renovate.json b/renovate.json
index fc4ccf09..5e38b913 100644
--- a/renovate.json
+++ b/renovate.json
@@ -23,7 +23,7 @@
     {
       "customType": "regex",
       "fileMatch": ["(^|/)\\.github/workflows/rust\\.yml$"],
-      "matchStrings": ["#\\s?renovate: rustc-stable\\s*rustc_version:\\s?'(?<currentValue>[\\d\\.\\d+\\.\\d+])'"],
+      "matchStrings": ["#\\s?renovate: rustc-stable\\s*rustc_version:\\s*'(?<currentValue>\\d\\.\\d+\\.\\d+)'"],
       "depNameTemplate": "rust",
       "lookupNameTemplate": "rust-lang/rust",
       "datasourceTemplate": "github-releases"