diff --git a/renovate.json b/renovate.json
index 632c05d6c6cee85c128aba375ddf639b4daa00b9..df02d7a97f9da71c08e3beb538a19474000f67cf 100644
--- a/renovate.json
+++ b/renovate.json
@@ -27,7 +27,7 @@
     {
       "fileMatch": ["Earthfile$"],
       "matchStrings": [
-          "FROM\\s+(?<depName>(?!\\+)[a-z0-9./-]+):?(?<currentValue>[a-z0-9-.]+)?@?(?<currentDigest>sha256:[a-f0-9]+)?"
+          "FROM\\s+(?<depName>(?!\\+)[a-z0-9.\\/-]+):?(?<currentValue>[a-z0-9-.]+)?@?(?<currentDigest>sha256:[a-f0-9]+)?"
       ],
       "datasourceTemplate": "docker",
       "versioningTemplate": "docker"