diff --git a/renovate.json b/renovate.json
index 2969162..3a440a9 100644
--- a/renovate.json
+++ b/renovate.json
@@ -9,7 +9,7 @@
       "datasourceTemplate": "docker",
       "versioningTemplate": "docker",
       "matchStrings": [
-        "image: (?<depName>.*?):(?<currentValue>.*?)$"
+        "^.*_image: (?<depName>.*?):(?<currentValue>.*?)$"
       ]
     }
   ]