diff --git a/configure.ac b/configure.ac
index d9f030ba2..66c207328 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@
 AC_INIT(README)
 AC_CANONICAL_SYSTEM
 AM_CONFIG_HEADER(config.h)
-AM_INIT_AUTOMAKE(gtk-sharp, 2.91.0)
+AM_INIT_AUTOMAKE(gtk-sharp, 2.99.0)
 AM_MAINTAINER_MODE
 
 API_VERSION=3.0.0.0
@@ -166,8 +166,8 @@ AC_SUBST(GENERATED_SOURCES)
 PKG_CHECK_MODULES(MONO_CAIRO, mono-cairo >= $MONO_REQUIRED_VERSION, enable_mono_cairo=no, enable_mono_cairo=yes)
 AC_SUBST(MONO_CAIRO_LIBS)
 
-GTK_REQUIRED_VERSION=2.14.0
-GLIB_REQUIRED_VERSION=2.14.0
+GTK_REQUIRED_VERSION=2.99.0
+GLIB_REQUIRED_VERSION=2.27.90
 
 PKG_CHECK_MODULES(GLIB, gobject-2.0 >= $GLIB_REQUIRED_VERSION)
 AC_SUBST(GLIB_CFLAGS)
@@ -185,11 +185,11 @@ PKG_CHECK_MODULES(ATK, atk)
 AC_SUBST(ATK_CFLAGS)
 AC_SUBST(ATK_LIBS)
 
-PKG_CHECK_MODULES(GTK, gtk+-2.0 >= $GTK_REQUIRED_VERSION)
+PKG_CHECK_MODULES(GTK, gtk+-3.0 >= $GTK_REQUIRED_VERSION)
 AC_SUBST(GTK_CFLAGS)
 AC_SUBST(GTK_LIBS)
 
-GDK_BACKEND=`pkg-config --variable=target gtk+-2.0`
+GDK_BACKEND=`pkg-config --variable=target gtk+-3.0`
 AC_SUBST(GDK_BACKEND)
 
 AC_PATH_PROG(MDOC, mdoc, no)
@@ -212,8 +212,6 @@ AC_OUTPUT([
 AssemblyInfo.cs
 Makefile
 policy.config
-gtk-sharp-2.0-lib.wxs
-gtk-sharp-2.0-dev.wxs
 sources/Makefile
 parser/Makefile
 parser/gapi-3.0.pc