diff --git a/share/inkscape.cmb b/share/inkscape.cmb
new file mode 100644
index 0000000000000000000000000000000000000000..931826e8010368841b173863f4d38cfc151328cf
--- /dev/null
+++ b/share/inkscape.cmb
@@ -0,0 +1,41 @@
+<?xml version='1.0' encoding='UTF-8' standalone='no'?>
+<!DOCTYPE cambalache-project SYSTEM "cambalache-project.dtd">
+<!-- Created with Cambalache 0.99.1 -->
+<cambalache-project version="0.96.0" target_tk="gtk-4.0">
+  <icontheme-search-path>icons/application/symbolic</icontheme-search-path>
+  <icontheme-search-path>icons/application/scalable</icontheme-search-path>
+  <icontheme-search-path>icons/multicolor/cursors</icontheme-search-path>
+  <icontheme-search-path>icons/multicolor/symbolic/actions</icontheme-search-path>
+  <icontheme-search-path>icons/Dash/cursors</icontheme-search-path>
+  <icontheme-search-path>icons/Dash/symbolic/actions</icontheme-search-path>
+  <icontheme-search-path>icons/Dash/scalable/actions</icontheme-search-path>
+  <icontheme-search-path>icons/hicolor/symbolic/actions</icontheme-search-path>
+  <icontheme-search-path>icons/hicolor/scalable/actions</icontheme-search-path>
+
+  <ui template-class="gtkmm__CustomObject_InkSpinButton">
+    <property id="adjustment" type-id="GtkAdjustment"/>
+    <property id="digits" type-id="gint"/>
+    <property id="value" type-id="gdouble"/>
+    <property id="min-value" type-id="gdouble"/>
+    <property id="max-value" type-id="gdouble"/>
+    <property id="step-value" type-id="gdouble"/>
+    <property id="scaling-factor" type-id="gdouble"/>
+    <property id="has-frame" type-id="gboolean"/>
+    <property id="show-arrows" type-id="gboolean"/>
+    <property id="enter-exit-editing" type-id="gboolean"/>
+    <property id="wrap-around" type-id="gboolean"/>
+    <property id="icon" type-id="gchararray"/>
+    <property id="label" type-id="gchararray"/>
+    <property id="prefix" type-id="gchararray"/>
+    <property id="suffix" type-id="gchararray"/>    
+    <content><![CDATA[<interface>
+  <requires lib="gtk" version="4.0"/>
+  <template class="gtkmm__CustomObject_InkSpinButton" parent="GtkWidget">
+    <child>
+      <object class="GtkSpinButton"/>
+    </child>
+  </template>
+</interface>
+]]></content>
+  </ui>
+</cambalache-project>
diff --git a/share/ui/character-viewer.ui b/share/ui/character-viewer.ui
index b85d2d79c570925e44eef64b3a99df86332aa8a4..579c746f91b02647e43381dc670f01fa9b1b668b 100644
--- a/share/ui/character-viewer.ui
+++ b/share/ui/character-viewer.ui
@@ -65,11 +65,6 @@
                 <property name="wrap">true</property>
               </object>
             </child>
-            <layout>
-              <property name="column">1</property>
-              <property name="row">1</property>
-              <property name="row-span">2</property>
-            </layout>
           </object>
         </child>
       </object>
diff --git a/share/ui/toolbar-objectpicker.ui b/share/ui/toolbar-objectpicker.ui
index 17b406fd1a51e0a1ce4b27789f9588201a2ea177..0e0d1924ff77e8ee10dd5016842dfeaa29c6a77e 100644
--- a/share/ui/toolbar-objectpicker.ui
+++ b/share/ui/toolbar-objectpicker.ui
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!-- Generated with glade 3.40.0 -->
 <interface>
-  <requires lib="gtk+" version="3.22"/>
+  <requires lib="gtk" version="4.0"/>
   <object class="GtkBox" id="objectpicker-toolbar">
     <property name="halign">start</property>
     <property name="hexpand">True</property>