--- a/wherefrom-compat.cabal
+++ b/wherefrom-compat.cabal
@@ -30,7 +30,7 @@ common warnings
 library
   import:           warnings
   exposed-modules:  GHC.InfoProv.Compat
-  build-depends:    base >=4.16.0.0 && <4.21.0.0
+  build-depends:    base >=4.16.0.0 && <5
   hs-source-dirs:   src
   default-language: Haskell2010
 
