diff --git a/README b/README
index 915dda73..805d5db6 100644
--- a/README
+++ b/README
@@ -11,9 +11,10 @@ Midori is a lightweight web browser.
 * Customizable and extensible interface.
 * Extensions written in C.
 
-Requirements: GTK+ 2.10, WebkitGTK+ 1.1.17, libXML2, libsoup 2.25.2, sqlite 3.0, Vala 0.10
+Requirements: GLib 2.22, GTK+ 2.10, WebkitGTK+ 1.1.17, libXML2,
+              libsoup 2.27.90, sqlite 3.0, Vala 0.10
 
-Optional: Unique 0.9, libnotify
+Optional: GTK+ 3.0, Unique 0.9, libnotify
 
 For installation instructions read INSTALL.
 
diff --git a/extensions/web-cache.c b/extensions/web-cache.c
index 9a3d0ebd..b038db8f 100644
--- a/extensions/web-cache.c
+++ b/extensions/web-cache.c
@@ -330,14 +330,8 @@ web_cache_mesage_got_headers_cb (SoupMessage* msg,
         if (!web_cache_save_headers (msg, filename))
             return;
 
-        #if GLIB_CHECK_VERSION (2, 20, 0)
         ostream = (GOutputStream*)g_file_append_to (file,
             G_FILE_CREATE_PRIVATE | G_FILE_CREATE_REPLACE_DESTINATION, NULL, NULL);
-        #else
-        g_unlink (filename);
-        ostream = (GOutputStream*)g_file_append_to (file,
-            G_FILE_CREATE_PRIVATE, NULL, NULL);
-        #endif
         g_object_unref (file);
 
         if (!ostream)
diff --git a/katze/katze-utils.c b/katze/katze-utils.c
index 2369ea2c..9869908b 100644
--- a/katze/katze-utils.c
+++ b/katze/katze-utils.c
@@ -101,11 +101,7 @@ katze_app_info_get_commandline (GAppInfo* info)
 {
     const gchar* exe;
 
-    #if GLIB_CHECK_VERSION (2, 20, 0)
     exe = g_app_info_get_commandline (info);
-    #else
-    exe = g_object_get_data (G_OBJECT (info), "katze-cmdline");
-    #endif
     if (!exe)
         exe = g_app_info_get_executable (info);
     if (!exe)
@@ -371,95 +367,6 @@ katze_app_info_get_all_for_category (const gchar* category)
     return apps;
 }
 
-#if !GLIB_CHECK_VERSION (2, 20, 0)
-/* Icon tokenization, for Glib < 2.20 */
-static gboolean
-g_icon_to_string_tokenized (GIcon   *icon,
-                            GString *s)
-{
-  GPtrArray *tokens;
-  guint i;
-
-  if (G_IS_THEMED_ICON (icon))
-    {
-      guint n;
-      const char * const *names;
-      tokens = g_ptr_array_new ();
-      g_object_get (icon, "names", &names, NULL);
-      for (n = 0; names[n] != NULL; n++)
-        g_ptr_array_add (tokens, g_strdup (names[n]));
-    }
-  else if (G_IS_FILE_ICON (icon))
-    {
-      tokens = g_ptr_array_new ();
-      g_ptr_array_add (tokens,
-                       g_file_get_uri (g_file_icon_get_file (G_FILE_ICON (icon))));
-    }
-  else
-    return FALSE;
-
-  g_string_append (s, g_type_name_from_instance ((GTypeInstance *)icon));
-
-  for (i = 0; i < tokens->len; i++)
-    {
-      char *token = g_ptr_array_index (tokens, i);
-
-      g_string_append_c (s, ' ');
-      g_string_append_uri_escaped (s, token, "!$&'()*+,;=:@/", TRUE);
-
-      g_free (token);
-    }
-
-  g_ptr_array_free (tokens, TRUE);
-
-  return TRUE;
-}
-
-/* GIcon serialization, for Glib < 2.20 */
-static gchar *
-g_icon_to_string (GIcon *icon)
-{
-  gchar *ret = NULL;
-
-  g_return_val_if_fail (G_IS_ICON (icon), NULL);
-
-  if (G_IS_FILE_ICON (icon))
-    {
-      GFile *file = g_file_icon_get_file (G_FILE_ICON (icon));
-      if (g_file_is_native (file))
-        {
-          ret = g_file_get_path (file);
-          if (!g_utf8_validate (ret, -1, NULL))
-            {
-              g_free (ret);
-              ret = NULL;
-            }
-        }
-      else
-        ret = g_file_get_uri (file);
-    }
-  else if (G_IS_THEMED_ICON (icon))
-    {
-      const char * const *names;
-      g_object_get (icon, "names", &names, NULL);
-      if (names && names[0] && names[0][0] != '.' &&
-          g_utf8_validate (names[0], -1, NULL) && names[1] == NULL)
-        ret = g_strdup (names[0]);
-    }
-
-  if (ret == NULL)
-    {
-      GString *s = g_string_new (". ");
-      if (g_icon_to_string_tokenized (icon, s))
-        ret = g_string_free (s, FALSE);
-      else
-        g_string_free (s, TRUE);
-    }
-
-  return ret;
-}
-#endif
-
 /**
  * katze_property_proxy:
  * @object: a #GObject
@@ -744,9 +651,6 @@ katze_property_proxy (gpointer     object,
 
                     info = g_app_info_create_from_commandline (string,
                         NULL, G_APP_INFO_CREATE_NONE, NULL);
-                    #if !GLIB_CHECK_VERSION (2, 20, 0)
-                    g_object_set_data (G_OBJECT (info), "katze-cmdline", string);
-                    #endif
                     entry = gtk_entry_new ();
                     exe = g_app_info_get_executable (info);
                     if (exe && *exe && strcmp (exe, "%f"))
diff --git a/midori/gtkiconentry.c b/midori/gtkiconentry.c
index 583a09a4..44fddc03 100644
--- a/midori/gtkiconentry.c
+++ b/midori/gtkiconentry.c
@@ -1419,8 +1419,6 @@ icon_theme_changed (GtkIconEntry *entry)
 
 	  gtk_icon_entry_set_icon_from_icon_name (entry, i, priv->icons[i].icon_name);
 	}
-
-      #if GLIB_CHECK_VERSION (2, 16, 0)
       else if (priv->icons[i].storage_type == _GTK_IMAGE_GICON)
 	{
 	  g_object_unref (priv->icons[i].pixbuf);
@@ -1428,7 +1426,6 @@ icon_theme_changed (GtkIconEntry *entry)
 
 	  gtk_icon_entry_set_icon_from_gicon (entry, i, priv->icons[i].gicon);
 	}
-      #endif
     }
 
   gtk_widget_queue_draw (GTK_WIDGET (entry));
diff --git a/midori/sokoke.c b/midori/sokoke.c
index 5530354d..14027c13 100644
--- a/midori/sokoke.c
+++ b/midori/sokoke.c
@@ -644,20 +644,6 @@ sokoke_hostname_from_uri (const gchar* uri,
     return g_strdup (uri);
 }
 
-/**
- * sokoke_hostname_to_ascii:
- * @uri: an URI string
- *
- * The specified hostname is encoded if it is not ASCII.
- *
- * Return value: a newly allocated hostname
- **/
-static gchar*
-sokoke_hostname_to_ascii (const gchar* hostname)
-{
-    return g_hostname_to_ascii (hostname);
-}
-
 /**
  * sokoke_uri_to_ascii:
  * @uri: an URI string
@@ -690,7 +676,7 @@ sokoke_uri_to_ascii (const gchar* uri)
     }
 
     hostname = sokoke_hostname_from_uri (uri, &path);
-    encoded = sokoke_hostname_to_ascii (hostname);
+    encoded = g_hostname_to_ascii (hostname);
 
     if (encoded)
     {
@@ -864,7 +850,7 @@ sokoke_magic_uri (const gchar* uri)
     if (!strchr (uri, ' ') &&
         ((search = strchr (uri, ':')) || (search = strchr (uri, '@'))) &&
         search[0] && !g_ascii_isalpha (search[1]))
-        return sokoke_idn_to_punycode (g_strconcat ("http://", uri, NULL));
+        return g_strconcat ("http://", uri, NULL);
     if ((!strcmp (uri, "localhost") || strchr (uri, '/'))
       && sokoke_resolve_hostname (uri))
         return g_strconcat ("http://", uri, NULL);
@@ -878,7 +864,7 @@ sokoke_magic_uri (const gchar* uri)
                 {
                     search = g_strconcat ("http://", uri, NULL);
                     g_strfreev (parts);
-                   return sokoke_idn_to_punycode (search);
+                   return search;
                 }
         }
         g_strfreev (parts);
@@ -1933,11 +1919,7 @@ sokoke_prefetch_uri (MidoriWebSettings*  settings,
     if (!s_uri || !s_uri->host)
         return FALSE;
 
-    #if GLIB_CHECK_VERSION (2, 22, 0)
     if (g_hostname_is_ip_address (s_uri->host))
-    #else
-    if (g_ascii_isdigit (s_uri->host[0]) && g_strstr_len (s_uri->host, 4, "."))
-    #endif
     {
         soup_uri_free (s_uri);
         return FALSE;
diff --git a/midori/sokoke.h b/midori/sokoke.h
index 20bb9dca..3e132df2 100644
--- a/midori/sokoke.h
+++ b/midori/sokoke.h
@@ -16,15 +16,6 @@
 #include <JavaScriptCore/JavaScript.h>
 #include <midori/midori-websettings.h>
 
-#if !GLIB_CHECK_VERSION (2, 14, 0)
-    #define G_PARAM_STATIC_STRINGS \
-    (G_PARAM_STATIC_NAME | G_PARAM_STATIC_NICK | G_PARAM_STATIC_BLURB)
-#endif
-
-#if !GLIB_CHECK_VERSION (2, 18, 0)
-    #define g_content_type_from_mime_type(mtp) g_strdup (mtp)
-#endif
-
 #if !GLIB_CHECK_VERSION (2, 30, 0)
     #define g_format_size(sz) g_format_size_for_display ((goffset)sz)
 #endif
diff --git a/wscript b/wscript
index 40b639ab..c7b616b2 100644
--- a/wscript
+++ b/wscript
@@ -185,7 +185,7 @@ def configure (conf):
     conf.check (lib='m', mandatory=True)
     check_pkg ('gmodule-2.0', '2.8.0', False)
     check_pkg ('gthread-2.0', '2.8.0', False)
-    check_pkg ('gio-2.0', '2.16.0')
+    check_pkg ('gio-2.0', '2.22.0')
     args = ''
     if Options.platform == 'win32':
         args = '--define-variable=target=win32'