diff --git a/lib/config/definitions.js b/lib/config/definitions.js
index 829df7b51b0a5901bf4ab69e5d8e2bfb61302ef9..8646c7e7453124f533aeff6f0e769b87eaf8cee4 100644
--- a/lib/config/definitions.js
+++ b/lib/config/definitions.js
@@ -305,6 +305,7 @@ const options = [
     description: 'Dependencies to ignore',
     type: 'list',
     stage: 'depType',
+    mergeable: true,
   },
   {
     name: 'packageRules',