diff --git a/renovate.json b/renovate.json
index 23decbd..40aa29e 100644
--- a/renovate.json
+++ b/renovate.json
@@ -29,7 +29,7 @@
       "matchStrings": [
         "  # renovate: datasource=(?<datasource>[^\\s]+) depName=(?<depName>[^\\s]+)\\n  openclawImageTag = \"(?<currentValue>[^\"]+)\";\\n  openclawImageDigest = \"sha256:(?<currentDigest>[^\"]+)\";"
       ],
-      "autoReplaceStringTemplate": "  # renovate: datasource={{{datasource}}} depName={{{depName}}}\n  openclawImageTag = \"{{{newValue}}}\";\n  openclawImageDigest = \"{{{newDigest}}}\";"
+      "autoReplaceStringTemplate": "  # renovate: datasource={{{datasource}}} depName={{{depName}}}\n  openclawImageTag = \"{{{newValue}}}\";\n  openclawImageDigest = \"sha256:{{{newDigest}}}\";"
     }
   ],
   "packageRules": [