diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b594200..19bda7d 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -16,6 +16,7 @@ jobs:
       fail-fast: false
       matrix:
         ghc:
+          - '9.12'
           - '9.10'
           - '9.8'
           - '9.6'
@@ -27,15 +28,15 @@ jobs:
           - '8.6'
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
-    - uses: haskell/actions/setup@v2
+    - uses: haskell-actions/setup@v2
       id: setup
       with:
         ghc-version: ${{ matrix.ghc }}
 
     - name: Restore cache
-      uses: actions/cache/restore@v3
+      uses: actions/cache/restore@v4
       id: cache
       with:
         path: ${{ steps.setup.outputs.cabal-store }}
@@ -44,11 +45,12 @@ jobs:
           ${{ runner.os }}-build-${{ matrix.ghc }}-
 
     - name: Install dependencies
+      if: ${{ steps.cache.outputs.cache-primary-key != steps.cache.outputs.cache-matched-key }}
       run: |
         cabal build --project-file=cabal_no_viewer.project --only-dependencies --enable-tests --enable-benchmarks all
 
     - name: Save cache
-      uses: actions/cache/save@v3
+      uses: actions/cache/save@v4
       if: ${{ steps.cache.outputs.cache-primary-key != steps.cache.outputs.cache-matched-key }}
       with:
         path: ${{ steps.setup.outputs.cabal-store }}
diff --git a/core/lib/Pdf/Core/Exception.hs b/core/lib/Pdf/Core/Exception.hs
index 390558c..1d624d6 100644
--- a/core/lib/Pdf/Core/Exception.hs
+++ b/core/lib/Pdf/Core/Exception.hs
@@ -1,5 +1,3 @@
-{-# LANGUAGE DeriveDataTypeable #-}
-
 -- | Exceptions and utilities
 module Pdf.Core.Exception
 (
@@ -10,20 +8,19 @@ module Pdf.Core.Exception
 )
 where
 
-import Data.Typeable
 import Control.Exception hiding (throw)
 
 -- | File is corrupted
 --
 -- Contains general message and a list of details
 data Corrupted = Corrupted String [String]
-  deriving (Show, Typeable)
+  deriving (Show)
 
 instance Exception Corrupted where
 
 -- | Something unexpected occurs, probably API missuse
 data Unexpected = Unexpected String [String]
-  deriving (Show, Typeable)
+  deriving (Show)
 
 instance Exception Unexpected where
 
diff --git a/core/lib/Pdf/Core/XRef.hs b/core/lib/Pdf/Core/XRef.hs
index f6301e5..2d94474 100644
--- a/core/lib/Pdf/Core/XRef.hs
+++ b/core/lib/Pdf/Core/XRef.hs
@@ -1,5 +1,4 @@
 {-# LANGUAGE OverloadedStrings #-}
-{-# LANGUAGE DeriveDataTypeable #-}
 
 -- | Cross reference
 
@@ -27,7 +26,6 @@ import Pdf.Core.Util
 import Pdf.Core.IO.Buffer (Buffer)
 import qualified Pdf.Core.IO.Buffer as Buffer
 
-import Data.Typeable
 import Data.Int
 import Data.ByteString (ByteString)
 import qualified Data.ByteString as ByteString
@@ -250,6 +248,6 @@ lookupStreamEntry dict is (R objNumber _) =
 
 -- | Unknown entry type should be interpreted as reference to null object
 data UnknownXRefStreamEntryType = UnknownXRefStreamEntryType Int
-  deriving (Show, Typeable)
+  deriving (Show)
 
 instance Exception UnknownXRefStreamEntryType
diff --git a/document/lib/Pdf/Document/Pdf.hs b/document/lib/Pdf/Document/Pdf.hs
index 9034da8..0ef3b77 100644
--- a/document/lib/Pdf/Document/Pdf.hs
+++ b/document/lib/Pdf/Document/Pdf.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE DeriveDataTypeable #-}
 {-# LANGUAGE OverloadedStrings #-}
 
 module Pdf.Document.Pdf
@@ -30,7 +29,6 @@ import Pdf.Core.Encryption (defaultUserPassword)
 
 import Pdf.Document.Internal.Types
 
-import Data.Typeable
 import Data.IORef
 import Data.ByteString (ByteString)
 import Data.Text (Text)
@@ -141,6 +139,6 @@ deref _ o = return o
 
 -- | File is enctypted
 data EncryptedError = EncryptedError Text
-  deriving (Show, Typeable)
+  deriving (Show)
 
 instance Exception EncryptedError