diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,7 @@
+### 3.0.36
+
++ The pixbuf parameter for [ClipboardImageReceivedFunc](https://hackage.haskell.org/package/gi-gtk-3.0.36/docs/GI-Gtk-Callbacks.html#g:signal:ClipboardImageReceivedFunc) is nullable, but it was not marked as such.
+
 ### 3.0.35
 
 + Avoid a crash in [radioButtonNew](https://hackage.haskell.org/package/gi-gtk-3.0.35/docs/GI-Gtk-Objects-RadioButton.html#g:method:new), [radioMenuItemNew](https://hackage.haskell.org/package/gi-gtk-3.0.35/docs/GI-Gtk-Objects-RadioMenuItem.html#g:method:new) and [radioToolButtonNew](https://hackage.haskell.org/package/gi-gtk-3.0.35/docs/GI-Gtk-Objects-RadioToolButton.html#g:method:new) (and variants) due to wrong introspection data.
diff --git a/Gtk.overrides b/Gtk.overrides
--- a/Gtk.overrides
+++ b/Gtk.overrides
@@ -13,6 +13,9 @@
 # upstream issue: https://bugzilla.gnome.org/show_bug.cgi?id=761339
 ignore WidgetPath.iter_add_qclass
 
+# The pixbuf parameter can be null is the request failed.
+set-attr Gtk/ClipboardImageReceivedFunc/@parameters/pixbuf nullable 1
+
 # Wrong introspection annotation, leading to crashes. See
 # https://bugzilla.gnome.org/show_bug.cgi?id=783381
 # https://github.com/haskell-gi/haskell-gi/issues/104
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-gtk-3.0.35/docs/GI-Gtk.html](https://hackage.haskell.org/package/gi-gtk-3.0.35/docs/GI-Gtk.html)
+[https://hackage.haskell.org/package/gi-gtk-3.0.36/docs/GI-Gtk.html](https://hackage.haskell.org/package/gi-gtk-3.0.36/docs/GI-Gtk.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/gi-gtk.cabal b/gi-gtk.cabal
--- a/gi-gtk.cabal
+++ b/gi-gtk.cabal
@@ -1,5 +1,5 @@
 name:                 gi-gtk
-version:              3.0.35
+version:              3.0.36
 synopsis:             Gtk bindings
 description:          Bindings for Gtk, autogenerated by haskell-gi.
 homepage:             https://github.com/haskell-gi/haskell-gi