diff --git a/renovate.json5 b/renovate.json5
index 6f2a47b..6f6830f 100644
--- a/renovate.json5
+++ b/renovate.json5
@@ -4,6 +4,9 @@
     ':rebaseStalePrs',
     'customManagers:dockerfileVersions',
   ],
+  dockerfile: {
+    fileMatch: [".*/Dockerfile$"]
+  },
   packageRules: [
     {
       matchUpdateTypes: [
@@ -64,4 +67,4 @@
   vulnerabilityAlerts: {
     enabled: true,
   },
-}
\ No newline at end of file
+}