diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,7 @@
+### 2.0.6
+
++ Depend on haskell-gi >= 0.26.9 (see [issue 439](https://github.com/haskell-gi/haskell-gi/issues/439))
+
 ### 2.0.5
 
 + Bump base lower bound
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-gmodule-2.0.5/docs/GI-GModule.html](https://hackage.haskell.org/package/gi-gmodule-2.0.5/docs/GI-GModule.html)
+[https://hackage.haskell.org/package/gi-gmodule-2.0.6/docs/GI-GModule.html](https://hackage.haskell.org/package/gi-gmodule-2.0.6/docs/GI-GModule.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
@@ -9,7 +9,7 @@
   where name = "GModule"
         version = "2.0"
         pkgName = "gi-gmodule"
-        pkgVersion = "2.0.5"
+        pkgVersion = "2.0.6"
         overridesFile = Nothing
         verbose = False
         outputDir = Nothing
diff --git a/gi-gmodule.cabal b/gi-gmodule.cabal
--- a/gi-gmodule.cabal
+++ b/gi-gmodule.cabal
@@ -1,5 +1,5 @@
 name:                 gi-gmodule
-version:              2.0.5
+version:              2.0.6
 synopsis:             GModule bindings
 description:          Bindings for GModule, 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 && < 0.27,
+                     haskell-gi >= 0.26.9 && < 0.27,
                      gi-glib == 2.0.*
 
 library
@@ -28,7 +28,7 @@
       pkgconfig-depends: gmodule-2.0
       build-depends: base >= 4.7 && <5,
                      haskell-gi-base >= 0.26 && < 0.27,
-                     haskell-gi >= 0.26 && < 0.27,
+                     haskell-gi >= 0.26.9 && < 0.27,
                      haskell-gi-overloading < 1.1,
                      gi-glib == 2.0.*,
                      bytestring >= 0.10 && < 1,
@@ -50,6 +50,7 @@
       exposed-modules: GI.GModule.Config,
                        GI.GModule,
                        GI.GModule.Callbacks,
+                       GI.GModule.Constants,
                        GI.GModule.Enums,
                        GI.GModule.Flags,
                        GI.GModule.Structs,
@@ -58,6 +59,7 @@
       autogen-modules: GI.GModule.Config,
                        GI.GModule,
                        GI.GModule.Callbacks,
+                       GI.GModule.Constants,
                        GI.GModule.Enums,
                        GI.GModule.Flags,
                        GI.GModule.Structs,