diff --git a/Data/Default/Instances/DList.hs b/Data/Default/Instances/DList.hs
--- a/Data/Default/Instances/DList.hs
+++ b/Data/Default/Instances/DList.hs
@@ -1,37 +1,47 @@
 {-
 
-Copyright (c) 2013 Lukas Mai
+Copyright (c) 2013, Lukas Mai
 
 All rights reserved.
 
-Redistribution and use in source and binary forms, with or without modification,
-are permitted provided that the following conditions are met:
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
 
-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimer.
-* Redistributions in binary form must reproduce the above copyright notice,
-  this list of conditions and the following disclaimer in the documentation
-  and/or other materials provided with the distribution.
-* Neither the name of the author nor the names of his contributors
-  may be used to endorse or promote products derived from this software
-  without specific prior written permission.
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
 
-THIS SOFTWARE IS PROVIDED BY LUKAS MAI AND CONTRIBUTORS "AS IS" AND ANY
-EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
-DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
-ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
 
+    * Neither the name of Lukas Mai nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
 -}
 
-module Data.Default.Instances.DList (
--- | This module defines 'Default' instances for the type 'DList'.
-) where
+{-# OPTIONS_GHC -fno-warn-orphans #-}
+
+{-|
+Module      : Data.Default.Instances.DList
+Description : Defines 'Default' instances for the type 'DList'.
+
+This module defines 'Default' instances for the type 'DList'.
+-}
+module Data.Default.Instances.DList () where
 
 import Data.Default.Class
 import Data.DList
diff --git a/LICENSE b/LICENSE
--- a/LICENSE
+++ b/LICENSE
@@ -1,26 +1,30 @@
-Copyright (c) 2013 Lukas Mai
+Copyright (c) 2013, Lukas Mai
 
 All rights reserved.
 
-Redistribution and use in source and binary forms, with or without modification,
-are permitted provided that the following conditions are met:
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
 
-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimer.
-* Redistributions in binary form must reproduce the above copyright notice,
-  this list of conditions and the following disclaimer in the documentation
-  and/or other materials provided with the distribution.
-* Neither the name of the author nor the names of his contributors
-  may be used to endorse or promote products derived from this software
-  without specific prior written permission.
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
 
-THIS SOFTWARE IS PROVIDED BY LUKAS MAI AND CONTRIBUTORS "AS IS" AND ANY
-EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
-DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
-ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of Lukas Mai nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/data-default-instances-dlist.cabal b/data-default-instances-dlist.cabal
--- a/data-default-instances-dlist.cabal
+++ b/data-default-instances-dlist.cabal
@@ -1,18 +1,20 @@
-Name:            data-default-instances-dlist
-Version:         0.0.1
-Cabal-Version:   >= 1.6
-Category:        Data
-Synopsis:        Default instances for types in dlist
-Build-Type:      Simple
-License:         BSD3
-License-File:    LICENSE
-Author:          Lukas Mai
-Maintainer:      <l.mai@web.de>
+cabal-version:   3.0
+name:            data-default-instances-dlist
+version:         0.0.1.1
+category:        Data
+synopsis:        Default instances for types in dlist
+build-type:      Simple
+license:         BSD-3-Clause
+license-file:    LICENSE
+copyright:       (c) 2013 Lukas Mai
+author:          Lukas Mai
+maintainer:      <lukasmai.403+hackage@gmail.com>
 
 source-repository head
-  type: git
-  location: https://github.com/mauke/data-default
+    type: git
+    location: https://github.com/mauke/data-default
 
-Library
-  Build-Depends:     base >=2 && <5, data-default-class, dlist
-  Exposed-Modules:   Data.Default.Instances.DList
+library
+    build-depends:     base >=2 && <5, data-default-class ^>=0.1.2.0, dlist
+    exposed-modules:   Data.Default.Instances.DList
+    default-language:  Haskell98
