--- haskell-unliftio-core-0.1.2.0.orig/unliftio-core.cabal
+++ haskell-unliftio-core-0.1.2.0/unliftio-core.cabal
@@ -26,7 +26,7 @@ library
   hs-source-dirs:
       src
   build-depends:
-      base >=4.5 && <4.12
+      base >=4.5 && <4.15
     , transformers >=0.2 && <0.6
   exposed-modules:
       Control.Monad.IO.Unlift
