diff --git a/indextype.cabal b/indextype.cabal
--- a/indextype.cabal
+++ b/indextype.cabal
@@ -1,5 +1,5 @@
 name:                 indextype
-version:              0.2.3.0
+version:              0.3.0.1
 synopsis: A series of type families and constraints for "indexable" types.
 description:
   This package deals with types that can roughly be "indexed" at compile time by an integer.
@@ -32,7 +32,7 @@
     Control.IndexT.TypeLevel,
     Control.IndexT.TypeLevel.Tuple
 
-  build-depends:        base == 4.9.*
+  build-depends:        base >= 4.9 && < 4.11
   hs-source-dirs:       src
   default-language:     Haskell2010
 
@@ -40,6 +40,6 @@
   type: exitcode-stdio-1.0
   main-is: Tests.hs
   other-modules: Control.IndexT, Control.IndexT.Tuple, Control.IndexT.Function, Control.IndexT.Constructor
-  build-depends:        base == 4.9.*, hspec == 2.4.*
+  build-depends:        base >= 4.9 && < 4.11, hspec == 2.4.*
   hs-source-dirs:       test, src
   default-language:     Haskell2010