diff --git a/ChangeLog.md b/ChangeLog.md
new file mode 100644
--- /dev/null
+++ b/ChangeLog.md
@@ -0,0 +1,3 @@
+### 3.0.12
+
+Fix a mistake in the introspection data in [bufferIterBackwardToContextClassToggle](https://hackage.haskell.org/package/gi-gtksource/docs/GI-GtkSource-Objects-Buffer.html#v:bufferIterBackwardToContextClassToggle) and [bufferIterForwardToContextClassToggle](https://hackage.haskell.org/package/gi-gtksource/docs/GI-GtkSource-Objects-Buffer.html#v:bufferIterForwardToContextClassToggle), fixes [#75](https://github.com/haskell-gi/haskell-gi/issues/75).
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-gtksource-3.0.12/docs/GI-GtkSource.html](https://hackage.haskell.org/package/gi-gtksource-3.0.12/docs/GI-GtkSource.html)
+[https://hackage.haskell.org/package/gi-gtksource-3.0.13/docs/GI-GtkSource.html](https://hackage.haskell.org/package/gi-gtksource-3.0.13/docs/GI-GtkSource.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-gtksource.cabal b/gi-gtksource.cabal
--- a/gi-gtksource.cabal
+++ b/gi-gtksource.cabal
@@ -1,5 +1,5 @@
 name:                 gi-gtksource
-version:              3.0.12
+version:              3.0.13
 synopsis:             GtkSource bindings
 description:          Bindings for GtkSource, autogenerated by haskell-gi.
 homepage:             https://github.com/haskell-gi/haskell-gi
@@ -11,12 +11,12 @@
 build-type:           Custom
 cabal-version:        >= 1.24
 
-extra-source-files: README.md stack.yaml GtkSource.overrides
+extra-source-files: README.md ChangeLog.md stack.yaml GtkSource.overrides
 
 custom-setup
       setup-depends: base >= 4.7 && < 5,
                      Cabal >= 1.24,
-                     haskell-gi >= 0.20 && < 1
+                     haskell-gi >= 0.20.1 && < 1
 
 Flag overloaded-methods
       Description: Generate support for overloaded methods.
@@ -36,7 +36,7 @@
       pkgconfig-depends: gtksourceview-3.0
       build-depends: base >= 4.7 && <5,
                      haskell-gi-base >= 0.20 && < 1,
-                     haskell-gi >= 0.20 && < 1,
+                     haskell-gi >= 0.20.1 && < 1,
                      gi-cairo == 1.0.*,
                      gi-pango == 1.0.*,
                      gi-gtk == 3.0.*,