diff --git a/data-default-class/Data/Default/Class.hs b/data-default-class/Data/Default/Class.hs
index 8bcd274..b16ea27 100644
--- a/data-default-class/Data/Default/Class.hs
+++ b/data-default-class/Data/Default/Class.hs
@@ -43,7 +43,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 {-|
 Module      : Data.Default.Class
-Description : Defines a class for types with a default value.
+Description : A class for types with a default value.
 
 This module defines a class for types with a default value.
 It also defines 'Default' instances for the types 'Int', 'Int8',
diff --git a/data-default-class/data-default-class.cabal b/data-default-class/data-default-class.cabal
index d736f7d..337fa28 100644
--- a/data-default-class/data-default-class.cabal
+++ b/data-default-class/data-default-class.cabal
@@ -3,6 +3,16 @@ name:            data-default-class
 version:         0.1.2.1
 category:        Data
 synopsis:        A class for types with a default value
+description:
+    This module defines a class for types with a default value.
+    It also defines 'Default' instances for the types 'Int', 'Int8',
+    'Int16', 'Int32', 'Int64', 'Word', 'Word8', 'Word16', 'Word32', 'Word64',
+    'Integer', 'Float', 'Double', 'Ratio', 'Complex', 'CShort', 'CUShort',
+    'CInt', 'CUInt', 'CLong', 'CULong', 'CLLong', 'CULLong', 'CPtrdiff',
+    'CSize', 'CSigAtomic', 'CIntPtr', 'CUIntPtr', 'CIntMax', 'CUIntMax',
+    'CClock', 'CTime', 'CUSeconds', 'CSUSeconds', 'CFloat', 'CDouble', '(->)',
+    'IO', 'Maybe', '()', '[]', 'Ordering', 'Any', 'All', 'Last', 'First', 'Sum',
+    'Product', 'Endo', 'Dual', and tuples.
 build-type:      Simple
 license:         BSD-3-Clause
 license-file:    LICENSE
@@ -18,6 +28,6 @@ library
     build-depends:     base >=2 && <5
     if impl(ghc == 7.4.*)
         -- for GHC.Generics
-        build-depends:     ghc-prim
+        build-depends:     ghc-prim ^>=0.2
     exposed-modules:   Data.Default.Class
     default-language:  Haskell98
diff --git a/data-default-instances-base/data-default-instances-base.cabal b/data-default-instances-base/data-default-instances-base.cabal
index b9c5a35..4ed7a9b 100644
--- a/data-default-instances-base/data-default-instances-base.cabal
+++ b/data-default-instances-base/data-default-instances-base.cabal
@@ -3,6 +3,9 @@ name:            data-default-instances-base
 version:         0.1.0.2
 category:        Data
 synopsis:        Default instances for types in base
+description:
+    This module reëxports the 'Data.Default.Class.Default' instances from the
+    "Data.Default.Class" module.
 build-type:      Simple
 license:         BSD-3-Clause
 license-file:    LICENSE
diff --git a/data-default-instances-containers/Data/Default/Instances/Containers.hs b/data-default-instances-containers/Data/Default/Instances/Containers.hs
index 63d10ec..bebcb11 100644
--- a/data-default-instances-containers/Data/Default/Instances/Containers.hs
+++ b/data-default-instances-containers/Data/Default/Instances/Containers.hs
@@ -37,7 +37,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 {-|
 Module      : Data.Default.Instances.Containers
-Description : Defines 'Default' instances for container types.
+Description : 'Default' instances for container types.
 
 This module defines 'Default' instances for the types 'S.Set', 'M.Map',
 'IntMap', 'IntSet', 'Seq', and 'Tree'.
diff --git a/data-default-instances-containers/data-default-instances-containers.cabal b/data-default-instances-containers/data-default-instances-containers.cabal
index d8cd6db..770ede9 100644
--- a/data-default-instances-containers/data-default-instances-containers.cabal
+++ b/data-default-instances-containers/data-default-instances-containers.cabal
@@ -3,6 +3,9 @@ name:            data-default-instances-containers
 version:         0.1.0.2
 category:        Data
 synopsis:        Default instances for types in containers
+description:
+    This module defines 'Default' instances for the types 'S.Set', 'M.Map',
+    'IntMap', 'IntSet', 'Seq', and 'Tree'.
 build-type:      Simple
 license:         BSD-3-Clause
 license-file:    LICENSE
@@ -15,6 +18,6 @@ source-repository head
     location: https://github.com/mauke/data-default
 
 library
-    build-depends:     base >=2 && <5, data-default-class ^>=0.1.2.0, containers
+    build-depends:     base >=2 && <5, data-default-class ^>=0.1.2.0, containers >=0.1 && <0.8
     exposed-modules:   Data.Default.Instances.Containers
     default-language:  Haskell98
diff --git a/data-default-instances-dlist/Data/Default/Instances/DList.hs b/data-default-instances-dlist/Data/Default/Instances/DList.hs
index 33c7ddc..639cc4a 100644
--- a/data-default-instances-dlist/Data/Default/Instances/DList.hs
+++ b/data-default-instances-dlist/Data/Default/Instances/DList.hs
@@ -37,9 +37,9 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 {-|
 Module      : Data.Default.Instances.DList
-Description : Defines 'Default' instances for the type 'DList'.
+Description : 'Default' instance for the type 'DList'.
 
-This module defines 'Default' instances for the type 'DList'.
+This module defines a 'Default' instance for the type 'DList'.
 -}
 module Data.Default.Instances.DList () where
 
diff --git a/data-default-instances-dlist/data-default-instances-dlist.cabal b/data-default-instances-dlist/data-default-instances-dlist.cabal
index 3b81332..ef21456 100644
--- a/data-default-instances-dlist/data-default-instances-dlist.cabal
+++ b/data-default-instances-dlist/data-default-instances-dlist.cabal
@@ -3,6 +3,8 @@ name:            data-default-instances-dlist
 version:         0.0.1.1
 category:        Data
 synopsis:        Default instances for types in dlist
+description:
+    This module defines a 'Default' instance for the type 'DList'.
 build-type:      Simple
 license:         BSD-3-Clause
 license-file:    LICENSE
@@ -15,6 +17,6 @@ source-repository head
     location: https://github.com/mauke/data-default
 
 library
-    build-depends:     base >=2 && <5, data-default-class ^>=0.1.2.0, dlist
+    build-depends:     base >=2 && <5, data-default-class ^>=0.1.2.0, dlist >=0.1 && <1.1
     exposed-modules:   Data.Default.Instances.DList
     default-language:  Haskell98
diff --git a/data-default-instances-old-locale/Data/Default/Instances/OldLocale.hs b/data-default-instances-old-locale/Data/Default/Instances/OldLocale.hs
index aefc755..987b2c7 100644
--- a/data-default-instances-old-locale/Data/Default/Instances/OldLocale.hs
+++ b/data-default-instances-old-locale/Data/Default/Instances/OldLocale.hs
@@ -37,9 +37,9 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 {-|
 Module      : Data.Default.Instances.OldLocale
-Description : Defines 'Default' instances for the type 'TimeLocale'.
+Description : 'Default' instances for the type 'TimeLocale'.
 
-This module defines 'Default' instances for the type 'TimeLocale'.
+This module defines a 'Default' instance for the type 'TimeLocale'.
 -}
 module Data.Default.Instances.OldLocale () where
 
diff --git a/data-default-instances-old-locale/data-default-instances-old-locale.cabal b/data-default-instances-old-locale/data-default-instances-old-locale.cabal
index 1dac724..90559e5 100644
--- a/data-default-instances-old-locale/data-default-instances-old-locale.cabal
+++ b/data-default-instances-old-locale/data-default-instances-old-locale.cabal
@@ -3,6 +3,8 @@ name:            data-default-instances-old-locale
 version:         0.0.1.1
 category:        Data
 synopsis:        Default instances for types in old-locale
+description:
+    This module defines a 'Default' instance for the type 'TimeLocale'.
 build-type:      Simple
 license:         BSD-3-Clause
 license-file:    LICENSE
@@ -15,6 +17,6 @@ source-repository head
     location: https://github.com/mauke/data-default
 
 library
-    build-depends:     base >=2 && <5, data-default-class ^>=0.1.2.0, old-locale
+    build-depends:     base >=2 && <5, data-default-class ^>=0.1.2.0, old-locale ^>=1.0
     exposed-modules:   Data.Default.Instances.OldLocale
     default-language:  Haskell98
diff --git a/data-default/Data/Default.hs b/data-default/Data/Default.hs
index 2945403..a0377b2 100644
--- a/data-default/Data/Default.hs
+++ b/data-default/Data/Default.hs
@@ -35,7 +35,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 {-|
 Module      : Data.Default
-Description : Defines a class for types with a default value.
+Description : A class for types with a default value.
 
 This module defines a class for types with a default value. Instances are
 provided for '()', 'Data.Set.Set', 'Data.Map.Map', 'Int', 'Integer',
diff --git a/data-default/data-default.cabal b/data-default/data-default.cabal
index e437608..45a7105 100644
--- a/data-default/data-default.cabal
+++ b/data-default/data-default.cabal
@@ -3,6 +3,10 @@ name:            data-default
 version:         0.7.1.2
 category:        Data
 synopsis:        A class for types with a default value
+description:
+    This module defines a class for types with a default value. Instances are
+    provided for '()', 'Data.Set.Set', 'Data.Map.Map', 'Int', 'Integer',
+    'Float', 'Double', and many others.
 build-type:      Simple
 license:         BSD-3-Clause
 license-file:    LICENSE
@@ -15,10 +19,10 @@ source-repository head
     location: https://github.com/mauke/data-default
 
 library
-    build-depends:     base >=2 && <5, data-default-class ^>=0.1.2.0,
-                       data-default-instances-containers,
-                       data-default-instances-dlist,
-                       data-default-instances-old-locale
+    build-depends:     base >=2 && <5, data-default-class ^>=0.1.2.1,
+                       data-default-instances-containers ^>=0.1.0.2,
+                       data-default-instances-dlist ^>=0.0.1.1,
+                       data-default-instances-old-locale ^>=0.0.1.1
     exposed-modules:   Data.Default
     default-language:  Haskell98