diff --git a/cabal.project.validate b/cabal.project.validate
index 66e823f62b172a6a88a8dc0aaba4b36834c2335b..1649646dde9c216f53caae8316905c5618d4ae53 100644
--- a/cabal.project.validate
+++ b/cabal.project.validate
@@ -30,3 +30,5 @@ package cabal-testsuite
   ghc-options: -Werror
 package cabal-install
   ghc-options: -Werror
+
+allow-newer: rere:base