diff --git a/JsonGrammar.cabal b/JsonGrammar.cabal
--- a/JsonGrammar.cabal
+++ b/JsonGrammar.cabal
@@ -1,5 +1,5 @@
 Name:           JsonGrammar
-Version:        0.3.3
+Version:        0.3.4
 Synopsis:       Combinators for bidirectional JSON parsing
 Description:   	Combinators for bidirectional JSON parsing
 
@@ -25,7 +25,7 @@
                     Data.Iso.TH,
                     Data.Iso.Common,
                     Language.JsonGrammar
-  Build-Depends:    base >= 3.0 && < 4.6,
+  Build-Depends:    base >= 3.0 && < 5,
                     aeson >= 0.6 && < 0.7,
                     semigroups >= 0.5 && < 0.9,
                     -- constraints copied from aeson-0.6.1.0: