diff --git a/CHANGELOG.markdown b/CHANGELOG.markdown
new file mode 100644
--- /dev/null
+++ b/CHANGELOG.markdown
@@ -0,0 +1,7 @@
+# Change log
+
+JSON Feed uses [Semantic Versioning][].
+The change log is available through the [releases on GitHub][].
+
+[Semantic Versioning]: http://semver.org/spec/v2.0.0.html
+[releases on GitHub]: https://github.com/tfausak/json-feed/releases
diff --git a/LICENSE.markdown b/LICENSE.markdown
--- a/LICENSE.markdown
+++ b/LICENSE.markdown
@@ -1,13 +1,13 @@
-# [The MIT License (MIT)][]
+MIT License
 
-Copyright (c) Taylor Fausak
+Copyright (c) 2018 Taylor Fausak
 
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal in
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
-of the Software, and to permit persons to whom the Software is furnished to do
-so, subject to the following conditions:
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
 
 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.
@@ -19,5 +19,3 @@
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
-
-[The MIT License (MIT)]: http://opensource.org/licenses/MIT
diff --git a/json-feed.cabal b/json-feed.cabal
--- a/json-feed.cabal
+++ b/json-feed.cabal
@@ -2,10 +2,10 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: bb3da7d5d38b5be1e7750d100d9d59b84e5d03006160d7de63f94192fc8348c5
+-- hash: 326a1e427a3541c8810a07d0bbf4ccbe067fa4d71a7613a59630ca73eaf5fd80
 
 name:           json-feed
-version:        1.0.0
+version:        1.0.1
 synopsis:       JSON Feed
 description:    This is an implementation of the JSON Feed spec in Haskell. The spec is available at <https://jsonfeed.org>. JSON Feed is similar to the Atom and RSS feed formats, but it is serialized as JSON rather than XML.
 category:       Web
@@ -18,6 +18,7 @@
 cabal-version:  >= 1.10
 
 extra-source-files:
+    CHANGELOG.markdown
     feeds/allenpike.com.json
     feeds/daringfireball.net.json
     feeds/flyingmeat.com.json
@@ -29,7 +30,9 @@
     feeds/shapeof.com.json
     feeds/therecord.co.json
     feeds/timetable.manton.org.json
+    package.yaml
     README.markdown
+    stack.yaml
 
 source-repository head
   type: git
@@ -38,16 +41,16 @@
 library
   hs-source-dirs:
       library
-  ghc-options: -Wall
+  ghc-options: -Weverything -Wno-implicit-prelude -Wno-safe -Wno-unsafe
   build-depends:
-      aeson ==1.2.*
-    , base ==4.10.*
-    , bytestring ==0.10.*
-    , mime-types ==0.1.*
-    , network-uri ==2.6.*
-    , tagsoup ==0.14.*
-    , text ==1.2.*
-    , time ==1.8.*
+      aeson >=0.11.2 && <0.12 || >=1.0.2 && <1.4
+    , base >=4.9.0 && <4.12
+    , bytestring >=0.10.8 && <0.11
+    , mime-types >=0.1.0 && <0.2
+    , network-uri >=2.6.1 && <2.7
+    , tagsoup >=0.14 && <0.15
+    , text >=1.2.2 && <1.3
+    , time >=1.6.0 && <1.9
   exposed-modules:
       JsonFeed
   other-modules:
@@ -56,22 +59,22 @@
 
 test-suite test
   type: exitcode-stdio-1.0
-  main-is: test.hs
+  main-is: Main.hs
   hs-source-dirs:
       tests
-  ghc-options: -Wall -rtsopts -threaded
+  ghc-options: -Weverything -Wno-implicit-prelude -Wno-safe -Wno-unsafe -rtsopts -threaded
   build-depends:
-      aeson ==1.2.*
-    , base ==4.10.*
-    , bytestring ==0.10.*
-    , filepath ==1.4.*
-    , hspec ==2.4.*
+      aeson >=0.11.2 && <0.12 || >=1.0.2 && <1.4
+    , base >=4.9.0 && <4.12
+    , bytestring >=0.10.8 && <0.11
+    , filepath >=1.4.1 && <1.5
+    , hspec >=2.2.3 && <2.6
     , json-feed
-    , mime-types ==0.1.*
-    , network-uri ==2.6.*
-    , tagsoup ==0.14.*
-    , text ==1.2.*
-    , time ==1.8.*
+    , mime-types >=0.1.0 && <0.2
+    , network-uri >=2.6.1 && <2.7
+    , tagsoup >=0.14 && <0.15
+    , text >=1.2.2 && <1.3
+    , time >=1.6.0 && <1.9
   other-modules:
       Paths_json_feed
   default-language: Haskell2010
diff --git a/library/JsonFeed.hs b/library/JsonFeed.hs
--- a/library/JsonFeed.hs
+++ b/library/JsonFeed.hs
@@ -27,7 +27,8 @@
 import Numeric.Natural (Natural)
 import Text.HTML.TagSoup (Tag)
 
-import qualified Data.Aeson as Json
+import qualified Data.Aeson as Json (eitherDecode, encode)
+import qualified Data.Aeson.Types as Json
 import qualified Data.List as List
 import qualified Data.Text as Text
 import qualified Data.Text.Encoding as Text
diff --git a/package.yaml b/package.yaml
new file mode 100644
--- /dev/null
+++ b/package.yaml
@@ -0,0 +1,49 @@
+name: json-feed
+version: 1.0.1
+
+category: Web
+description: >
+  This is an implementation of the JSON Feed spec in Haskell. The spec is
+  available at <https://jsonfeed.org>. JSON Feed is similar to the Atom and RSS
+  feed formats, but it is serialized as JSON rather than XML.
+extra-source-files:
+  - CHANGELOG.markdown
+  - feeds/*.json
+  - package.yaml
+  - README.markdown
+  - stack.yaml
+github: tfausak/json-feed
+license-file: LICENSE.markdown
+license: MIT
+maintainer: Taylor Fausak
+synopsis: JSON Feed
+
+dependencies:
+  aeson: '>= 0.11.2 && < 0.12 || >= 1.0.2 && < 1.4'
+  base: '>= 4.9.0 && < 4.12'
+  bytestring: '>= 0.10.8 && < 0.11'
+  mime-types: '>= 0.1.0 && < 0.2'
+  network-uri: '>= 2.6.1 && < 2.7'
+  tagsoup: '>= 0.14 && < 0.15'
+  text: '>= 1.2.2 && < 1.3'
+  time: '>= 1.6.0 && < 1.9'
+ghc-options:
+  - -Weverything
+  - -Wno-implicit-prelude
+  - -Wno-safe
+  - -Wno-unsafe
+
+library:
+  source-dirs: library
+
+tests:
+  test:
+    dependencies:
+      filepath: '>= 1.4.1 && < 1.5'
+      hspec: '>= 2.2.3 && < 2.6'
+      json-feed: -any
+    ghc-options:
+      - -rtsopts
+      - -threaded
+    main: Main.hs
+    source-dirs: tests
diff --git a/stack.yaml b/stack.yaml
new file mode 100644
--- /dev/null
+++ b/stack.yaml
@@ -0,0 +1,1 @@
+resolver: lts-11.0
diff --git a/tests/Main.hs b/tests/Main.hs
new file mode 100644
--- /dev/null
+++ b/tests/Main.hs
@@ -0,0 +1,33 @@
+module Main (main) where
+
+import System.FilePath ((</>), (<.>))
+
+import qualified Control.Monad as Monad
+import qualified Data.ByteString.Lazy as ByteString
+import qualified Data.Either as Either
+import qualified JsonFeed
+import qualified Test.Hspec as Hspec
+
+
+main :: IO ()
+main = Hspec.hspec . Hspec.parallel . Hspec.describe "JsonFeed" $ do
+  Monad.forM_ feeds $ \feed -> do
+    Hspec.it ("parses the " ++ feed ++ " feed") $ do
+      let file = "feeds" </> feed <.> "json"
+      contents <- ByteString.readFile file
+      JsonFeed.parseFeed contents `Hspec.shouldSatisfy` Either.isRight
+
+feeds :: [String]
+feeds =
+  [ "allenpike.com"
+  , "daringfireball.net"
+  , "flyingmeat.com"
+  , "hypercritical.co"
+  , "inessential.com"
+  , "jsonfeed.org"
+  , "manton.org"
+  , "maybepizza.com"
+  , "shapeof.com"
+  , "therecord.co"
+  , "timetable.manton.org"
+  ]
diff --git a/tests/test.hs b/tests/test.hs
deleted file mode 100644
--- a/tests/test.hs
+++ /dev/null
@@ -1,33 +0,0 @@
-module Main (main) where
-
-import JsonFeed
-import System.FilePath ((</>), (<.>))
-import Test.Hspec
-
-import qualified Control.Monad as Monad
-import qualified Data.ByteString.Lazy as ByteString
-import qualified Data.Either as Either
-
-
-main :: IO ()
-main = hspec . parallel . describe "JsonFeed" $ do
-  Monad.forM_ feeds $ \feed -> do
-    it ("parses the " ++ feed ++ " feed") $ do
-      let file = "feeds" </> feed <.> "json"
-      contents <- ByteString.readFile file
-      parseFeed contents `shouldSatisfy` Either.isRight
-
-feeds :: [String]
-feeds =
-  [ "allenpike.com"
-  , "daringfireball.net"
-  , "flyingmeat.com"
-  , "hypercritical.co"
-  , "inessential.com"
-  , "jsonfeed.org"
-  , "manton.org"
-  , "maybepizza.com"
-  , "shapeof.com"
-  , "therecord.co"
-  , "timetable.manton.org"
-  ]