diff --git a/.ghci b/.ghci
deleted file mode 100644
index 630ab055..00000000
--- a/.ghci
+++ /dev/null
@@ -1,4 +0,0 @@
-:set -isrc
-
--- Since we're in GHCi, we can't be using GHCJS
-:set -isrc-ghc
diff --git a/.github/workflows/haskell.yml b/.github/workflows/haskell.yml
index fdc57e72..8a8bbe26 100644
--- a/.github/workflows/haskell.yml
+++ b/.github/workflows/haskell.yml
@@ -6,7 +6,7 @@ jobs:
   build:
     strategy:
       matrix:
-        ghc: ['8.6', '8.8', '8.10', '9.0', '9.2', '9.4', '9.6', '9.8', '9.10']
+        ghc: ['8.6', '8.8', '8.10', '9.0', '9.2', '9.4', '9.6', '9.8', '9.10', '9.12']
         os: ['ubuntu-latest', 'macos-13'] # https://github.com/haskell-actions/setup/issues/77
     runs-on: ${{ matrix.os }}
 
diff --git a/reflex-dom-core/reflex-dom-core.cabal b/reflex-dom-core/reflex-dom-core.cabal
index 12d973ca..00eb3c72 100644
--- a/reflex-dom-core/reflex-dom-core.cabal
+++ b/reflex-dom-core/reflex-dom-core.cabal
@@ -73,7 +73,7 @@ library
   hs-source-dirs: src
   build-depends:
     aeson >= 0.8 && < 2.3,
-    base >= 4.7 && < 4.21,
+    base >= 4.7 && < 4.22,
     bifunctors >= 4.2 && < 6,
     bimap >= 0.3 && < 0.6,
     blaze-builder >= 0.4.1 && < 0.5,
@@ -175,7 +175,7 @@ library
   if flag(use-template-haskell)
     build-depends:
       dependent-sum-template >= 0.1 && < 0.3,
-      template-haskell >= 2.12.0 && < 2.23
+      template-haskell >= 2.12.0 && < 2.24
     other-extensions: TemplateHaskell
     cpp-options: -DUSE_TEMPLATE_HASKELL
     other-modules:
diff --git a/reflex-dom-core/src/Reflex/Dom/Xhr.hs b/reflex-dom-core/src/Reflex/Dom/Xhr.hs
index 31095e5a..8dd81e14 100644
--- a/reflex-dom-core/src/Reflex/Dom/Xhr.hs
+++ b/reflex-dom-core/src/Reflex/Dom/Xhr.hs
@@ -1,5 +1,4 @@
 {-# LANGUAGE CPP #-}
-{-# LANGUAGE DeriveDataTypeable #-}
 {-# LANGUAGE DeriveFunctor #-}
 {-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE GADTs #-}
@@ -174,7 +173,6 @@ import Data.Text.Encoding
 import qualified Data.Text.Lazy as LT
 import qualified Data.Text.Lazy.Builder as B
 import Data.Traversable
-import Data.Typeable
 
 import Language.Javascript.JSaddle.Monad (JSM, askJSM, runJSM, MonadJSM, liftJSM)
 
@@ -183,7 +181,7 @@ data XhrRequest a
                 , _xhrRequest_url :: Text
                 , _xhrRequest_config :: XhrRequestConfig a
                 }
-   deriving (Show, Read, Eq, Ord, Typeable, Functor)
+   deriving (Show, Read, Eq, Ord, Functor)
 
 data XhrRequestConfig a
    = XhrRequestConfig { _xhrRequestConfig_headers :: Map Text Text
@@ -194,7 +192,7 @@ data XhrRequestConfig a
                       , _xhrRequestConfig_withCredentials :: Bool
                       , _xhrRequestConfig_responseHeaders :: XhrResponseHeaders
                       }
-   deriving (Show, Read, Eq, Ord, Typeable, Functor)
+   deriving (Show, Read, Eq, Ord, Functor)
 
 data XhrResponse
    = XhrResponse { _xhrResponse_status :: Word
@@ -203,12 +201,11 @@ data XhrResponse
                  , _xhrResponse_responseText :: Maybe Text
                  , _xhrResponse_headers :: Map (CI Text) Text
                  }
-   deriving (Typeable)
 
 data XhrResponseHeaders =
     OnlyHeaders (Set.Set (CI Text)) -- ^ Parse a subset of headers from the XHR Response
   | AllHeaders -- ^ Parse all headers from the XHR Response
-  deriving (Show, Read, Eq, Ord, Typeable)
+  deriving (Show, Read, Eq, Ord)
 
 instance Default XhrResponseHeaders where
   def = OnlyHeaders mempty
diff --git a/reflex-dom-core/src/Reflex/Dom/Xhr/Exception.hs b/reflex-dom-core/src/Reflex/Dom/Xhr/Exception.hs
index f394a644..aa661af8 100644
--- a/reflex-dom-core/src/Reflex/Dom/Xhr/Exception.hs
+++ b/reflex-dom-core/src/Reflex/Dom/Xhr/Exception.hs
@@ -1,12 +1,9 @@
-{-# LANGUAGE DeriveDataTypeable #-}
-
 module Reflex.Dom.Xhr.Exception where
 
 import Control.Exception (Exception (..))
-import Data.Typeable
 
 data XhrException = XhrException_Error
                   | XhrException_Aborted
-     deriving (Show, Read, Eq, Ord, Typeable)
+     deriving (Show, Read, Eq, Ord)
 
 instance Exception XhrException
diff --git a/reflex-dom-core/src/Reflex/Dom/Xhr/ResponseType.hs b/reflex-dom-core/src/Reflex/Dom/Xhr/ResponseType.hs
index 360d2081..7c3d90e6 100644
--- a/reflex-dom-core/src/Reflex/Dom/Xhr/ResponseType.hs
+++ b/reflex-dom-core/src/Reflex/Dom/Xhr/ResponseType.hs
@@ -1,10 +1,7 @@
-{-# LANGUAGE DeriveDataTypeable #-}
-
 module Reflex.Dom.Xhr.ResponseType where
 
 import Data.ByteString (ByteString)
 import Data.Text (Text)
-import Data.Typeable
 import GHCJS.DOM.Blob (Blob)
 
 data XhrResponseType
@@ -12,7 +9,7 @@ data XhrResponseType
   | XhrResponseType_ArrayBuffer
   | XhrResponseType_Blob
   | XhrResponseType_Text
-  deriving (Show, Read, Eq, Ord, Typeable)
+  deriving (Show, Read, Eq, Ord)
 
 data XhrResponseBody
   = XhrResponseBody_Default Text
diff --git a/reflex-dom-test-selenium/reflex-dom-test-selenium.cabal b/reflex-dom-test-selenium/reflex-dom-test-selenium.cabal
index ec9598b7..5e1025e2 100644
--- a/reflex-dom-test-selenium/reflex-dom-test-selenium.cabal
+++ b/reflex-dom-test-selenium/reflex-dom-test-selenium.cabal
@@ -15,7 +15,7 @@ library
   hs-source-dirs: src
   build-depends:
     async,
-    base >= 4.7 && < 4.21,
+    base >= 4.7 && < 4.22,
     bytestring >= 0.10 && < 0.13,
     chrome-test-utils,
     exceptions,
diff --git a/reflex-dom/reflex-dom.cabal b/reflex-dom/reflex-dom.cabal
index 6a91fa48..0ced4c55 100644
--- a/reflex-dom/reflex-dom.cabal
+++ b/reflex-dom/reflex-dom.cabal
@@ -71,7 +71,7 @@ library
     cpp-options: -DANDROID
     build-tools: hsc2hs
   build-depends:
-    base >= 4.7 && < 4.21,
+    base >= 4.7 && < 4.22,
     bytestring >= 0.10 && < 0.13,
     reflex >= 0.8 && < 1,
     reflex-dom-core >= 0.8.1.0 && <0.9,