diff --git a/renovate.json b/renovate.json
index 3b3bfc4..865034d 100644
--- a/renovate.json
+++ b/renovate.json
@@ -13,7 +13,7 @@
         "^Dockerfile$"
       ],
       "matchStrings": [
-        "\\s+ENV\\s*MORTY_VERSION=\"(?<currentValue>.*?)\"\\s+"
+        "\\s+ENV\\s*MORTY_VERSION=\"(?<currentDigest>.*?)\"\\s+"
       ],
       "depNameTemplate": "https://github.com/asciimoo/morty.git",
       "versioningTemplate": "git",