diff --git a/renovate.json b/renovate.json
index 310cf85..0b6784d 100644
--- a/renovate.json
+++ b/renovate.json
@@ -1,8 +1,6 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "extends": [
-    "config:base"
-  ],
+  "extends": ["config:base"],
   "regexManagers": [
     {
       "fileMatch": ["^Dockerfile$"],
@@ -13,7 +11,7 @@
     {
       "fileMatch": ["^Makefile$"],
       "matchStrings": [
-        "datasource=(?<datasource>.*?) depName=(?<depName>.*?)( versioning=(?<versioning>.*?))?\\sexport .*?_VERSION \?= (?<currentValue>.*)\\s"
+        "datasource=(?<datasource>.*?) depName=(?<depName>.*?)( versioning=(?<versioning>.*?))?\\sexport .*?_VERSION \\?= (?<currentValue>.*)\\s"
       ]
     }
   ]