diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,18 @@
+0.1.0.0
+----
+* Add support for null values on Default (issue #3)
+* If cli cabal flag is false, have `parseConfigSpec` return `ConfigSpec ()`
+  instead of ambiguous `FromJSON` value (issue #3)
+* Bump aeson dependency to `<1.3`
+
+0.0.0.2
+----
+* Rename System.Etc.Internal.Util module to System.Etc.Internal.Extra
+* Rename cabal flag from printer to extra
+* Add feature for Environment Variable misspelling reports
+* Add misspelling reports to example projects
+* Improvements on README
+
 0.0.0.1
 ----
 * Various changes to source code to comply with previous resolvers
diff --git a/etc.cabal b/etc.cabal
--- a/etc.cabal
+++ b/etc.cabal
@@ -3,7 +3,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           etc
-version:        0.0.0.2
+version:        0.1.0.0
 synopsis:       Declarative configuration spec for Haskell projects
 description:    Please see README.md
 category:       Configuration, System
@@ -50,7 +50,7 @@
   ghc-options: -Wall
   build-depends:
       base >=4.7 && <5
-    , aeson >=0.11 && <1.2
+    , aeson >=0.11 && <1.3
     , bytestring >=0.10 && <0.11
     , containers >=0.5 && <0.6
     , text >=1.2 && <1.3
@@ -113,7 +113,7 @@
   ghc-options: -Wall
   build-depends:
       base >=4.7 && <5
-    , aeson >=0.11 && <1.2
+    , aeson >=0.11 && <1.3
     , bytestring >=0.10 && <0.11
     , containers >=0.5 && <0.6
     , text >=1.2 && <1.3
diff --git a/src/System/Etc/Internal/Extra/Printer.hs b/src/System/Etc/Internal/Extra/Printer.hs
--- a/src/System/Etc/Internal/Extra/Printer.hs
+++ b/src/System/Etc/Internal/Extra/Printer.hs
@@ -21,6 +21,9 @@
 renderJsonValue :: JSON.Value -> (Doc, Int)
 renderJsonValue value' =
   case value' of
+    JSON.Null ->
+      (text "null", 4)
+
     JSON.String str ->
       (text $ Text.unpack str, Text.length str)
 
diff --git a/src/System/Etc/Spec.hs b/src/System/Etc/Spec.hs
--- a/src/System/Etc/Spec.hs
+++ b/src/System/Etc/Spec.hs
@@ -15,7 +15,9 @@
 
 import Control.Monad.Catch (MonadCatch (..))
 
-import qualified Data.Aeson   as JSON
+#ifdef WITH_CLI
+import qualified Data.Aeson as JSON
+#endif
 import qualified Data.Text    as Text
 import qualified Data.Text.IO as Text (readFile)
 
@@ -30,10 +32,18 @@
 flag is set).
 
 -}
+#ifdef WITH_CLI
 parseConfigSpec
   :: (MonadCatch m, JSON.FromJSON cmd)
     => Text               -- ^ Text to be parsed
     -> m (ConfigSpec cmd) -- ^ returns ConfigSpec
+#else
+parseConfigSpec
+  :: (MonadCatch m)
+    => Text               -- ^ Text to be parsed
+    -> m (ConfigSpec ()) -- ^ returns ConfigSpec
+#endif
+
 #ifdef WITH_YAML
 parseConfigSpec input =
    catch (JSON.parseConfigSpec input)
@@ -49,10 +59,16 @@
 either JSON or YAML (if cabal flag is set).
 
 -}
+#ifdef WITH_CLI
 readConfigSpec
   :: JSON.FromJSON cmd
   => Text -- ^ Filepath where contents are going to be read from and parsed
   -> IO (ConfigSpec cmd) -- ^ returns ConfigSpec
+#else
+readConfigSpec
+  :: Text -- ^ Filepath where contents are going to be read from and parsed
+  -> IO (ConfigSpec ()) -- ^ returns ConfigSpec
+#endif
 readConfigSpec filepath = do
   contents <- Text.readFile $ Text.unpack filepath
   parseConfigSpec contents
diff --git a/test/System/Etc/Resolver/DefaultTest.hs b/test/System/Etc/Resolver/DefaultTest.hs
--- a/test/System/Etc/Resolver/DefaultTest.hs
+++ b/test/System/Etc/Resolver/DefaultTest.hs
@@ -5,8 +5,9 @@
 
 import Protolude
 
-import Test.Tasty       (TestTree, testGroup)
-import Test.Tasty.HUnit (assertBool, assertFailure, testCase)
+import qualified Data.Aeson       as JSON
+import           Test.Tasty       (TestTree, testGroup)
+import           Test.Tasty.HUnit (assertBool, assertFailure, testCase)
 
 
 import qualified Data.Set as Set
@@ -60,5 +61,28 @@
         Just set ->
           assertBool ("expecting to see entry from env; got " <> show set)
                    (Set.member (Default "hello default") set)
+
+  , testCase "default can be a null JSON value" $ do
+      let
+        input =
+          mconcat
+            [
+              "{\"etc/entries\": {"
+            , " \"greeting\": null}}"
+            ]
+      (spec :: ConfigSpec ()) <- parseConfigSpec input
+
+      let
+        config =
+            resolveDefault spec
+
+      case getAllConfigSources ["greeting"] config of
+        Nothing ->
+          assertFailure ("expecting to get entries for greeting\n"
+                         <> show config)
+        Just set ->
+          assertBool ("expecting to see entry from env; got " <> show set)
+                     (Set.member (Default JSON.Null) set)
+
 
   ]
diff --git a/test/System/Etc/SpecTest.hs b/test/System/Etc/SpecTest.hs
--- a/test/System/Etc/SpecTest.hs
+++ b/test/System/Etc/SpecTest.hs
@@ -170,6 +170,7 @@
           assertBool "" True
   ]
 
+#ifdef WITH_CLI
 cli_tests :: TestTree
 cli_tests =
   testGroup "cli"
@@ -273,6 +274,7 @@
           assertBool "" True
 
   ]
+#endif
 
 envvar_tests :: TestTree
 envvar_tests =
@@ -330,5 +332,7 @@
   , yaml_tests
 #endif
   , envvar_tests
+#ifdef WITH_CLI
   , cli_tests
+#endif
   ]