diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,7 @@
+### 1.5.9
+
++ Use haskell-gi 0.27.
+
 ### 1.5.8
 
 + Depend on haskell-gi >= 0.26.9 (see [issue 439](https://github.com/haskell-gi/haskell-gi/issues/439))
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Documentation
 Autogenerated documentation for this package can be found at
 
-[https://hackage.haskell.org/package/gi-ibus-1.5.8/docs/GI-IBus.html](https://hackage.haskell.org/package/gi-ibus-1.5.8/docs/GI-IBus.html)
+[https://hackage.haskell.org/package/gi-ibus-1.5.9/docs/GI-IBus.html](https://hackage.haskell.org/package/gi-ibus-1.5.9/docs/GI-IBus.html)
 
 For general documentation on using [haskell-gi](https://github.com/haskell-gi/haskell-gi) based bindings, see [the project page](https://github.com/haskell-gi/haskell-gi) or [the Wiki](https://github.com/haskell-gi/haskell-gi/wiki).
diff --git a/Setup.hs b/Setup.hs
--- a/Setup.hs
+++ b/Setup.hs
@@ -1,6 +1,6 @@
 {-# LANGUAGE OverloadedStrings #-}
 
-import Data.GI.CodeGen.CabalHooks (setupBinding, TaggedOverride(..))
+import Data.GI.CodeGen.CabalHooks (setupBinding, TaggedOverride(..), TaggedPkgConfigVersions(..))
 
 import qualified GI.GLib.Config as GLib
 import qualified GI.GObject.Config as GObject
@@ -8,12 +8,13 @@
 
 
 main :: IO ()
-main = setupBinding name version pkgName pkgVersion verbose overridesFile inheritedOverrides outputDir
+main = setupBinding name version pkgName pkgVersion verbose overridesFile inheritedOverrides depVersions outputDir
   where name = "IBus"
         version = "1.0"
         pkgName = "gi-ibus"
-        pkgVersion = "1.5.8"
+        pkgVersion = "1.5.9"
         overridesFile = Nothing
         verbose = False
         outputDir = Nothing
         inheritedOverrides = [TaggedOverride "inherited:GLib" GLib.overrides, TaggedOverride "inherited:GObject" GObject.overrides, TaggedOverride "inherited:Gio" Gio.overrides]
+        depVersions = [TaggedPkgConfigVersions "GLib" GLib.pkgConfigVersions, TaggedPkgConfigVersions "GObject" GObject.pkgConfigVersions, TaggedPkgConfigVersions "Gio" Gio.pkgConfigVersions]
diff --git a/gi-ibus.cabal b/gi-ibus.cabal
--- a/gi-ibus.cabal
+++ b/gi-ibus.cabal
@@ -1,5 +1,5 @@
 name:                 gi-ibus
-version:              1.5.8
+version:              1.5.9
 synopsis:             IBus bindings
 description:          Bindings for IBus, autogenerated by haskell-gi.
 homepage:             https://github.com/haskell-gi/haskell-gi
@@ -16,7 +16,7 @@
 custom-setup
       setup-depends: base >= 4.11 && < 5,
                      Cabal >= 1.24 && < 4,
-                     haskell-gi >= 0.26.9 && < 0.27,
+                     haskell-gi >= 0.27 && < 0.28,
                      gi-gio == 2.0.*,
                      gi-gobject == 2.0.*,
                      gi-glib == 2.0.*
@@ -30,7 +30,7 @@
       pkgconfig-depends: ibus-1.0 >= 1.5 && < 1.6
       build-depends: base >= 4.7 && <5,
                      haskell-gi-base >= 0.26 && < 0.27,
-                     haskell-gi >= 0.26.9 && < 0.27,
+                     haskell-gi >= 0.27 && < 0.28,
                      haskell-gi-overloading < 1.1,
                      gi-gio == 2.0.*,
                      gi-gobject == 2.0.*,
@@ -75,6 +75,7 @@
                        GI.IBus.Objects.InputContext,
                        GI.IBus.Objects.Keymap,
                        GI.IBus.Objects.LookupTable,
+                       GI.IBus.Objects.Message,
                        GI.IBus.Objects.Object,
                        GI.IBus.Objects.ObservedPath,
                        GI.IBus.Objects.PanelService,
@@ -90,6 +91,7 @@
                        GI.IBus.Objects.XEvent,
                        GI.IBus.Structs,
                        GI.IBus.Structs.ProcessKeyEventData,
+                       GI.IBus.Structs.RGBA,
                        GI.IBus.Structs.Rectangle,
                        GI.IBus.Structs.XML
 
@@ -117,6 +119,7 @@
                        GI.IBus.Objects.InputContext,
                        GI.IBus.Objects.Keymap,
                        GI.IBus.Objects.LookupTable,
+                       GI.IBus.Objects.Message,
                        GI.IBus.Objects.Object,
                        GI.IBus.Objects.ObservedPath,
                        GI.IBus.Objects.PanelService,
@@ -132,5 +135,6 @@
                        GI.IBus.Objects.XEvent,
                        GI.IBus.Structs,
                        GI.IBus.Structs.ProcessKeyEventData,
+                       GI.IBus.Structs.RGBA,
                        GI.IBus.Structs.Rectangle,
                        GI.IBus.Structs.XML