diff --git a/sexpr-parser.cabal b/sexpr-parser.cabal
--- a/sexpr-parser.cabal
+++ b/sexpr-parser.cabal
@@ -1,5 +1,5 @@
 name:                   sexpr-parser
-version:                0.2.0.0
+version:                0.2.1.0
 synopsis:               Simple s-expression parser
 description:
   This package provides a simple Megaparsec-based s-expression parser.
@@ -23,10 +23,10 @@
     , Text.SExpression.Types
     , Text.SExpression.Default
   build-depends:
-      base              >= 4.9 && < 4.13
+      base              >= 4.9 && < 5
     , megaparsec        >= 6.5 && < 7.1
     , data-default      >= 0.6 && < 0.8
-    
+
 test-suite sexpr-parser-spec
   type:                 exitcode-stdio-1.0
   default-language:     Haskell2010
@@ -35,18 +35,18 @@
   other-modules:
       Text.SExpression.InternalSpec
   build-depends:
-      base              >= 4.9 && < 4.13
+      base              >= 4.9 && < 5
     , hspec             >= 2.5 && < 2.8
     , megaparsec        >= 6.5 && < 7.1
     , data-default      >= 0.6 && < 0.8
     , sexpr-parser
-                  
+
 executable sexpr-parser-z3-demo
   default-language:     Haskell2010
   hs-source-dirs:       z3-demo
   main-is:              Main.hs
   build-depends:
-      base              >= 4.9 && < 4.13
+      base              >= 4.9 && < 5
     , bytestring        >= 0.10 && < 0.11
     , megaparsec        >= 6.5 && < 7.1
     , process           >= 1.6 && < 1.7