diff --git a/shared.json b/shared.json
index 884bc8e..83a2c99 100644
--- a/shared.json
+++ b/shared.json
@@ -213,7 +213,7 @@
       "description": "Update install-* Buildpack commands and _VERSION variables in shell scripts",
       "fileMatch": ["\\.sh$", "\\.ps1$"],
       "matchStrings": [
-        "# renovate: datasource=(?<datasource>.+?) depName=(?<depName>.+?)(?: (?:packageName|lookupName)=(?<packageName>.+?))?( versioning=(?<versioning>.+?))?\\s\\$?[A-Z0-9_]+?_VERSION\\s*=\\s*\"?(?<currentValue>.+?)\"?\\s",
+        "# renovate: datasource=(?<datasource>.+?) depName=(?<depName>.+?)(?: (?:packageName|lookupName)=(?<packageName>.+?))?( versioning=(?<versioning>.+?))?\\s\\$?[A-Z0-9_]+?_VERSION\\s*=\\s*['\"]?(?<currentValue>.+?)['\"]?\\s",
         "# renovate: datasource=(?<datasource>.+?)(?: (?:packageName|lookupName)=(?<packageName>.+?))?(?: versioning=(?<versioning>.+?))?\\sinstall-[a-z]+? (?<depName>[a-z0-9-]+?) (?<currentValue>.+?)\\s"
       ]
     },