diff --git a/CHANGELOG.markdown b/CHANGELOG.markdown
--- a/CHANGELOG.markdown
+++ b/CHANGELOG.markdown
@@ -1,7 +1,11 @@
 # aeson-pretty changelog
 
-## 0.8.10
+## 0.8.11
+ * Dropped support for Aeson 1.4 and older
+ * Added support for Aeson 2.3
  * Added support for Aeson 2.2
+
+## 0.8.10
  * Added support for Aeson 2.1
 
 ## 0.8.9
diff --git a/Data/Aeson/Encode/Pretty.hs b/Data/Aeson/Encode/Pretty.hs
--- a/Data/Aeson/Encode/Pretty.hs
+++ b/Data/Aeson/Encode/Pretty.hs
@@ -95,10 +95,11 @@
 data Indent = Spaces Int | Tab
 
 data NumberFormat
-  -- | The standard behaviour of the 'Aeson.encode' function. Uses
-  --   integer literals for integers (1, 2, 3...), simple decimals
-  --   for fractional values between 0.1 and 9,999,999, and scientific
-  --   notation otherwise.
+  -- | For numbers with absolute value less than 1e19, this follows the standard
+  -- behaviour of the 'Data.Aeson.encode' function. Uses integer literals for
+  -- integers (1, 2, 3...), simple decimals for fractional values between 0.1
+  -- and 9,999,999, and scientific notation otherwise. For numbers with an
+  -- absolute value larger than 1e19, always uses scientific notation.
   = Generic
   -- | Scientific notation (e.g. 2.3e123).
   | Scientific
diff --git a/aeson-pretty.cabal b/aeson-pretty.cabal
--- a/aeson-pretty.cabal
+++ b/aeson-pretty.cabal
@@ -1,6 +1,6 @@
 cabal-version:  2.0
 name:           aeson-pretty
-version:        0.8.10
+version:        0.8.11
 license:        BSD3
 license-file:   LICENSE
 category:       Text, Web, JSON, Pretty Printer
@@ -14,7 +14,7 @@
 synopsis:       JSON pretty-printing library and command-line tool.
 description:
     A JSON pretty-printing library compatible with aeson as well as
-    a command-line tool to improve readabilty of streams of JSON data.
+    a command-line tool to improve readability of streams of JSON data.
     .
     The /library/ provides the function "encodePretty". It is a drop-in
     replacement for aeson's "encode" function, producing JSON-ByteStrings for
@@ -22,27 +22,26 @@
     .
     The /command-line tool/ reads JSON from stdin and writes prettified JSON
     to stdout. It also offers a complementary "compact"-mode, essentially the
-    opposite of pretty-printing. If you specify @-flib-only@ like this
-    .
-        > cabal install -flib-only aeson-pretty
-    .
-    the command-line tool will NOT be installed.
+    opposite of pretty-printing.
 
 extra-source-files:
     README.markdown
+
+extra-doc-files:
     CHANGELOG.markdown
 
 flag lib-only
     description: Only build/install the library, NOT the command-line tool.
     default: False
+    manual: True
 
 library
     exposed-modules:
         Data.Aeson.Encode.Pretty
 
     build-depends:
-        aeson ^>=1.1 || ^>=1.2 || ^>=1.3 || ^>=1.4 || ^>=1.5 || ^>=2.0 || ^>=2.1 || ^>=2.2,
-        base >= 4.5,
+        aeson >=1.5  && <2.4,
+        base >= 4.10 && < 4.23,
         base-compat >= 0.9,
         bytestring >= 0.9,
         scientific >= 0.3,
@@ -50,10 +49,6 @@
         text >= 0.11,
         unordered-containers >= 0.2.14.0
 
-    if !impl(ghc >= 8.0)
-      build-depends:
-        semigroups >= 0.18.2
-
     ghc-options: -Wall
     default-language: Haskell2010
 
@@ -71,12 +66,11 @@
             aeson-pretty,
             attoparsec >= 0.10,
             attoparsec-aeson,
-            base == 4.*,
+            base >= 4.10 && < 4.23,
             bytestring >= 0.9,
             cmdargs >= 0.7
 
     ghc-options: -Wall
-    ghc-prof-options: -auto-all
     default-language: Haskell2010
 
 source-repository head
diff --git a/cli-tool/Main.hs b/cli-tool/Main.hs
--- a/cli-tool/Main.hs
+++ b/cli-tool/Main.hs
@@ -1,10 +1,14 @@
-{-# LANGUAGE DeriveDataTypeable, RecordWildCards, OverloadedStrings #-}
+{-# LANGUAGE CPP, DeriveDataTypeable, RecordWildCards, OverloadedStrings, PackageImports #-}
 module Main (main) where
 
 import Prelude hiding (interact, concat, unlines, null)
 import Data.Aeson (Value(..), encode)
 import Data.Aeson.Encode.Pretty
-import Data.Aeson.Parser.Internal (value')
+#if MIN_VERSION_aeson(2,2,0)
+import "attoparsec-aeson" Data.Aeson.Parser.Internal (value')
+#else
+import "aeson" Data.Aeson.Parser.Internal (value')
+#endif
 import Data.Attoparsec.Lazy (Result(..), parse)
 import Data.ByteString.Lazy.Char8 (ByteString, interact, unlines, null)
 import Data.Version (showVersion)
@@ -16,7 +20,11 @@
                     , indent  :: Int
                     , sort    :: Bool
                     }
+#if __GLASGOW_HASKELL__ >= 912
+    deriving (Data)
+#else
     deriving (Data, Typeable)
+#endif
 
 opts :: Options
 opts = Opts