diff --git a/renovate.json b/renovate.json
index 9b27344..c58f651 100644
--- a/renovate.json
+++ b/renovate.json
@@ -14,8 +14,8 @@
     {
       "fileMatch": ["^.*\\.nix$"],
       "matchStrings": [
-        "image *=(\r\n|\r|\n)? *\"(?<depName>[^\"]+):(?<currentValue>[^\"]+)(@(?<currentDigest>sha256:[a-f0-9]+))?\";",
-        "Image *=(\r\n|\r|\n)? *\"(?<depName>[^\"]+):(?<currentValue>[^\"]+)(@(?<currentDigest>sha256:[a-f0-9]+))?\";"
+        "image\\s*=\\s*\"(?P<depName>[^:]+):(?P<currentValue>[^@\"]+)(?:@(?P<currentDigest>sha256:[a-f0-9]+))?",
+        "Image\\s*=\\s*\"(?P<depName>[^:]+):(?P<currentValue>[^@\"]+)(?:@(?P<currentDigest>sha256:[a-f0-9]+))?"
       ],
       "datasourceTemplate": "docker"
     }