diff --git a/src/Data/Validity.hs b/src/Data/Validity.hs
--- a/src/Data/Validity.hs
+++ b/src/Data/Validity.hs
@@ -20,7 +20,7 @@
 
  The @Validity@ typeclass allows us to specify this invariant (and enables
  testing via the @genvalidity@ libraries:
- https://hackage.haskell.org/package/genvalidity):
+ https://hackage.haskell.org/package/genvalidity ):
 
  > instance Validity Prime where
  >     isValid (Prime n) = isPrime n
diff --git a/validity.cabal b/validity.cabal
--- a/validity.cabal
+++ b/validity.cabal
@@ -1,7 +1,13 @@
 name:                validity
-version:             0.3.0.1
+version:             0.3.0.2
 synopsis:            Validity typeclass
-description:         Please see README.md
+description:        
+  Note: There are companion instance packages for this library:
+  .
+  * <https://hackage.haskell.org/package/validity-text validity-text>
+  .                                                 
+  * <https://hackage.haskell.org/package/validity-containers validity-containers>
+
 homepage:            https://github.com/NorfairKing/validity#readme
 license:             MIT
 license-file:        LICENSE
@@ -17,7 +23,7 @@
   hs-source-dirs:      src
   exposed-modules:     Data.Validity
                      , Data.RelativeValidity
-  build-depends:       base >= 4.7 && < 5
+  build-depends:       base >= 4 && < 5
   default-language:    Haskell2010
 
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