diff --git a/cabal.project b/cabal.project
index 778d40a..3a089e3 100644
--- a/cabal.project
+++ b/cabal.project
@@ -2,3 +2,4 @@ packages: .
 allow-newer:
   , *:base
   , *:template-haskell
+  , *:ghc-prim