diff --git a/MetaBrush.cabal b/MetaBrush.cabal
index 422b518..c28a064 100644
--- a/MetaBrush.cabal
+++ b/MetaBrush.cabal
@@ -29,13 +29,6 @@ flag asserts
   default: False
   manual:  True
 
--- Workaround for https://github.com/haskell/cabal/issues/4237
--- See https://github.com/commercialhaskell/stack/issues/2197
-flag gtk-410
-  description: GTK is 4.10 or later
-  default: True
-  manual:  False
-
 common common
 
     build-depends:
@@ -165,13 +158,8 @@ common gtk
       , haskell-gi-base
            >= 0.26.8     && < 0.27
 
-    -- Workaround for https://github.com/haskell/cabal/issues/4237
-    -- See https://github.com/commercialhaskell/stack/issues/2197
-    if flag(gtk-410)
-      pkgconfig-depends: gtk4 >= 4.10
-      cpp-options: -DMIN_VERSION_GTK_4_10
-    else
-      pkgconfig-depends: gtk4 < 4.10
+    pkgconfig-depends:
+        gtk4 >= 4.10
 
 library metabrushes
 
diff --git a/src/app/MetaBrush/Asset/Colours.hs b/src/app/MetaBrush/Asset/Colours.hs
index bf0669f..d919a23 100644
--- a/src/app/MetaBrush/Asset/Colours.hs
+++ b/src/app/MetaBrush/Asset/Colours.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE CPP #-}
 {-# LANGUAGE OverloadedStrings #-}
 
 {-# OPTIONS_GHC -fno-warn-deprecations #-}
@@ -94,12 +93,5 @@ getColours
 getColours _provider =
   for colourNames \ ( ColourName { colourName } ) -> do
     widget <- GTK.fixedNew
-#if MIN_VERSION_GTK_4_10
     GTK.widgetAddCssClass widget colourName
-    GTK.widgetGetColor widget
-#else
-    style <- GTK.widgetGetStyleContext widget
-    GTK.styleContextAddProvider style _provider ( fromIntegral GTK.STYLE_PROVIDER_PRIORITY_USER )
-    GTK.styleContextAddClass style colourName
-    GTK.styleContextGetColor style
-#endif
+    GTK.widgetGetColor widget
\ No newline at end of file
diff --git a/src/app/MetaBrush/GTK/Util.hs b/src/app/MetaBrush/GTK/Util.hs
index 1a174a5..1a935e6 100644
--- a/src/app/MetaBrush/GTK/Util.hs
+++ b/src/app/MetaBrush/GTK/Util.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE CPP #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 
@@ -64,31 +63,17 @@ showRGBA rgba = withRGBA rgba \ r g b a ->
 
 widgetAddClasses :: ( HasCallStack, GTK.IsWidget widget, MonadIO m ) => widget -> [Text] -> m ()
 widgetAddClasses widget classNames =
-#if MIN_VERSION_GTK_4_10
   for_ classNames ( GTK.widgetAddCssClass widget )
-#else
-  do
-    styleContext <- GTK.widgetGetStyleContext widget
-    for_ classNames ( GTK.styleContextAddClass styleContext )
-#endif
 
 widgetAddClass :: ( HasCallStack, GTK.IsWidget widget, MonadIO m ) => widget -> Text -> m ()
 widgetAddClass widget className =
-#if MIN_VERSION_GTK_4_10
   GTK.widgetAddCssClass widget className
-#else
-  GTK.widgetGetStyleContext widget >>= ( `GTK.styleContextAddClass` className )
-#endif
 
 --------------------------------------------------------------------------------
 
 widgetShow :: ( HasCallStack, GTK.IsWidget widget, MonadIO m ) => widget -> m ()
 widgetShow widget =
-#if MIN_VERSION_GTK_4_10
   GTK.widgetSetVisible widget True
-#else
-  GTK.widgetShow widget
-#endif
 
 --------------------------------------------------------------------------------