diff --git a/namecoin-update.cabal b/namecoin-update.cabal
index 7651c1e..c363382 100644
--- a/namecoin-update.cabal
+++ b/namecoin-update.cabal
@@ -24,7 +24,7 @@ source-repository head
 library
   hs-source-dirs:      src/lib
   exposed-modules:     Namecoin
-  build-depends:       base >= 4.9 && < 4.10, lens, wreq,
+  build-depends:       base <= 5.0, lens, wreq,
                        aeson, text, attoparsec
   default-extensions:  TemplateHaskell, OverloadedStrings
                        RecordWildCards, DuplicateRecordFields
@@ -33,5 +33,5 @@ library
 executable namecoin-update
   hs-source-dirs:      src
   main-is:             Main.hs
-  build-depends:       base >= 4.9 && < 4.10, text, namecoin-update
+  build-depends:       base <= 5.0, text, namecoin-update
   default-language:    Haskell2010