diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 0bb8236..4786373 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -18,6 +18,7 @@ jobs:
           - 8.8.4
           - 8.10.7
           - 9.0.1
+          - 9.4.7
         exclude:
           - os: macOS-latest
             ghc: 8.6.5
@@ -25,10 +26,10 @@ jobs:
             ghc: 8.6.5
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
       if: github.event.action == 'opened' || github.event.action == 'synchronize' || github.event.ref == 'refs/heads/master'
 
-    - uses: haskell/actions/setup@v1
+    - uses: haskell-actions/setup@v2
       id: setup-haskell-cabal
       name: Setup Haskell
       with:
@@ -38,7 +39,7 @@ jobs:
       run: |
         cabal freeze
 
-    - uses: actions/cache@v2
+    - uses: actions/cache@v3
       name: Cache ~/.cabal/store
       with:
         path: ${{ steps.setup-haskell-cabal.outputs.cabal-store }}
@@ -64,6 +65,7 @@ jobs:
           - 8.8.4
           - 8.10.7
           - 9.0.1
+          - 9.4.7
         exclude:
           - os: macOS-latest
             ghc: 8.6.5
@@ -71,17 +73,17 @@ jobs:
             ghc: 8.6.5
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
       if: github.event.action == 'opened' || github.event.action == 'synchronize' || github.event.ref == 'refs/heads/master'
 
-    - uses: haskell/actions/setup@v1
+    - uses: haskell-actions/setup@v2
       name: Setup Haskell Stack
       with:
         ghc-version: ${{ matrix.ghc }}
         stack-no-global: true
         enable-stack: true
 
-    - uses: actions/cache@v2
+    - uses: actions/cache@v3
       name: Cache ~/.stack
       with:
         path: ~/.stack
diff --git a/hue.cabal b/hue.cabal
index 4d73c80..c7983a8 100644
--- a/hue.cabal
+++ b/hue.cabal
@@ -43,7 +43,7 @@ library
                       , http-types
                       , blaze-builder
                       , hostname
-                      , aeson < 2
+                      , aeson > 2
                       , bytestring
                       , text
                       , containers
diff --git a/src/Hue/Internal/Light.hs b/src/Hue/Internal/Light.hs
index 8b20caf..f36fef5 100644
--- a/src/Hue/Internal/Light.hs
+++ b/src/Hue/Internal/Light.hs
@@ -15,6 +15,7 @@ module Hue.Internal.Light where
 import Prelude hiding (fail)
 
 import Data.Aeson
+import qualified Data.Aeson.KeyMap as KeyMap
 import Data.Time (LocalTime)
 import Data.Text (Text)
 import qualified Data.Text as Text
@@ -24,7 +25,6 @@ import Data.Set (Set)
 import qualified Data.Set as Set
 import qualified Data.Map as Map
 
-import qualified Data.HashMap.Lazy as HashMap
 import Data.Word
 import Data.Function
 import Data.Foldable
@@ -451,7 +451,7 @@ instance FromJSON ColorMode where
 instance FromJSON ScanResult where
   parseJSON = withObject "Scan result object" $ \v -> do
     lastScanTime <- v .: "lastscan"
-    lightMap <- parseJSON $ Object $ HashMap.delete "lastscan" v
+    lightMap <- parseJSON $ Object $ KeyMap.delete "lastscan" v
     new <- Map.toList <$> traverse parseName lightMap
     pure $ ScanResult new lastScanTime
     where
diff --git a/src/Hue/Internal/Sensor.hs b/src/Hue/Internal/Sensor.hs
index 622aeba..c4e12ed 100644
--- a/src/Hue/Internal/Sensor.hs
+++ b/src/Hue/Internal/Sensor.hs
@@ -15,6 +15,7 @@ module Hue.Internal.Sensor where
 import Prelude hiding (fail)
 
 import Data.Aeson
+import qualified Data.Aeson.KeyMap as KeyMap
 import Data.Time (LocalTime)
 import Data.Text (Text)
 import qualified Data.Text as Text
@@ -182,7 +183,7 @@ instance ToJSON SensorName where
 instance FromJSON ScanResult where
   parseJSON = withObject "Scan result object" $ \v -> do
     lastScanTime <- v .: "lastscan"
-    sensorMap <- parseJSON $ Object $ HashMap.delete "lastscan" v
+    sensorMap <- parseJSON $ Object $ KeyMap.delete "lastscan" v
     new <- Map.toList <$> traverse parseName sensorMap
     pure $ ScanResult new lastScanTime
     where
diff --git a/stack-9.4.7.yaml b/stack-9.4.7.yaml
new file mode 100644
index 0000000..02775a3
--- /dev/null
+++ b/stack-9.4.7.yaml
@@ -0,0 +1,68 @@
+# This file was automatically generated by 'stack init'
+#
+# Some commonly used options have been documented as comments in this file.
+# For advanced use and comprehensive documentation of the format, please see:
+# http://docs.haskellstack.org/en/stable/yaml_configuration/
+
+# Resolver to choose a 'specific' stackage snapshot or a compiler version.
+# A snapshot resolver dictates the compiler version and the set of packages
+# to be used for project dependencies. For example:
+#
+# resolver: lts-3.5
+# resolver: nightly-2015-09-21
+# resolver: ghc-7.10.2
+# resolver: ghcjs-0.1.0_ghc-7.10.2
+# resolver:
+#  name: custom-snapshot
+#  location: "./custom-snapshot.yaml"
+resolver: lts-21.19
+# User packages to be built.
+# Various formats can be used as shown in the example below.
+#
+# packages:
+# - some-directory
+# - https://example.com/foo/bar/baz-0.0.2.tar.gz
+# - location:
+#    git: https://github.com/commercialhaskell/stack.git
+#    commit: e7b331f14bcffb8367cd58fbfc8b40ec7642100a
+# - location: https://github.com/commercialhaskell/stack/commit/e7b331f14bcffb8367cd58fbfc8b40ec7642100a
+#   extra-dep: true
+#  subdirs:
+#  - auto-update
+#  - wai
+#
+# A package marked 'extra-dep: true' will only be built if demanded by a
+# non-dependency (i.e. a user package), and its test suites and benchmarks
+# will not be run. This is useful for tweaking upstream packages.
+packages:
+- '.'
+# Dependency packages to be pulled from upstream that are not in the resolver
+# (e.g., acme-missiles-0.3)
+extra-deps: []
+
+# Override default flag values for local packages and extra-deps
+flags:
+  mintty:
+    Win32-2-13-1: false
+
+# Extra package databases containing global packages
+extra-package-dbs: []
+
+
+# Control whether we use the GHC we find on the path
+# system-ghc: true
+#
+# Require a specific version of stack, using version ranges
+# require-stack-version: -any # Default
+# require-stack-version: ">=1.4"
+#
+# Override the architecture used by stack, especially useful on Windows
+# arch: i386
+# arch: x86_64
+#
+# Extra directories used by stack for building
+# extra-include-dirs: [/path/to/dir]
+# extra-lib-dirs: [/path/to/dir]
+#
+# Allow a newer minor version of GHC than the snapshot specifies
+# compiler-check: newer-minor
\ No newline at end of file
diff --git a/stack.yaml b/stack.yaml
index 41d664c..02775a3 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -15,7 +15,7 @@
 # resolver:
 #  name: custom-snapshot
 #  location: "./custom-snapshot.yaml"
-resolver: lts-18.18
+resolver: lts-21.19
 # User packages to be built.
 # Various formats can be used as shown in the example below.
 #
diff --git a/stack.yaml.lock b/stack.yaml.lock
index a9834e3..87d76bb 100644
--- a/stack.yaml.lock
+++ b/stack.yaml.lock
@@ -6,7 +6,7 @@
 packages: []
 snapshots:
 - completed:
-    size: 586296
-    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/18/18.yaml
-    sha256: 63539429076b7ebbab6daa7656cfb079393bf644971156dc349d7c0453694ac2
-  original: lts-18.18
+    sha256: fb482b8e2d5d061cdda4ba1da2957c012740c893a5ee1c1b99001adae7b1fbe7
+    size: 640046
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/21/19.yaml
+  original: lts-21.19