@@ -24,5 +24,5 @@ source-repository head
2424library
2525 exposed-modules: Data.Syntax
2626 Data.Syntax.Char
27− build-depends: base, mono-traversable, lens, semi-iso
27+ build-depends: base >= 4 && < 5, mono-traversable, lens, semi-iso
2828 default-language: Haskell2010