diff --git a/src/frontends/gnome/properties/nm-strongswan-dialog.ui b/src/frontends/gnome/properties/nm-strongswan-dialog.ui
index bb47c634e..66b170c0a 100644
--- a/src/frontends/gnome/properties/nm-strongswan-dialog.ui
+++ b/src/frontends/gnome/properties/nm-strongswan-dialog.ui
@@ -1,64 +1,52 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!-- Generated with glade 3.38.2 -->
+<!-- Generated with glade 3.38.2, not compatible anymore -->
 <interface>
   <requires lib="gtk+" version="3.10"/>
   <object class="GtkFileChooserDialog" id="certificate-chooser">
     <property name="can-focus">False</property>
-    <property name="title" translatable="yes">Choose a server or CA certificate…</property>
     <property name="modal">True</property>
-    <property name="type-hint">dialog</property>
-    <child internal-child="vbox">
-      <object class="GtkBox">
+    <child type="titlebar">
+      <object class="GtkHeaderBar">
+        <property name="visible">True</property>
         <property name="can-focus">False</property>
-        <property name="orientation">vertical</property>
-        <property name="spacing">2</property>
-        <child internal-child="action_area">
-          <object class="GtkButtonBox">
+        <property name="show-close-button">False</property>
+        <child type="title">
+          <object class="GtkLabel">
+            <property name="label" translatable="yes">Choose a server or CA certificate…</property>
+            <property name="visible">True</property>
             <property name="can-focus">False</property>
-            <property name="layout-style">end</property>
-            <child>
-              <object class="GtkButton" id="certificate-chooser-cancel">
-                <property name="label" translatable="yes">_Cancel</property>
-                <property name="visible">True</property>
-                <property name="can-focus">True</property>
-                <property name="receives-default">False</property>
-                <property name="use-underline">True</property>
-              </object>
-              <packing>
-                <property name="expand">True</property>
-                <property name="fill">True</property>
-                <property name="position">0</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkButton" id="certificate-chooser-accept">
-                <property name="label" translatable="yes">_Select</property>
-                <property name="visible">True</property>
-                <property name="can-focus">True</property>
-                <property name="can-default">True</property>
-                <property name="has-default">True</property>
-                <property name="receives-default">True</property>
-                <property name="use-underline">True</property>
-                <style>
-                  <class name="default"/>
-                  <class name="suggested-action"/>
-                </style>
-              </object>
-              <packing>
-                <property name="expand">True</property>
-                <property name="fill">True</property>
-                <property name="position">1</property>
-              </packing>
-            </child>
+            <style>
+              <class name="title"/>
+            </style>
           </object>
-          <packing>
-            <property name="expand">False</property>
-            <property name="fill">False</property>
-            <property name="position">0</property>
-          </packing>
         </child>
         <child>
-          <placeholder/>
+          <object class="GtkButton" id="certificate-chooser-cancel">
+            <property name="label" translatable="yes">_Cancel</property>
+            <property name="visible">True</property>
+            <property name="can-focus">True</property>
+            <property name="receives-default">False</property>
+            <property name="use-underline">True</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkButton" id="certificate-chooser-accept">
+            <property name="label" translatable="yes">_Select</property>
+            <property name="visible">True</property>
+            <property name="can-focus">True</property>
+            <property name="can-default">True</property>
+            <property name="has-default">True</property>
+            <property name="receives-default">True</property>
+            <property name="use-underline">True</property>
+            <style>
+              <class name="default"/>
+              <class name="suggested-action"/>
+            </style>
+          </object>
+          <packing>
+            <property name="position">1</property>
+            <property name="pack-type">end</property>
+          </packing>
         </child>
       </object>
     </child>
@@ -756,61 +744,49 @@
   </object>
   <object class="GtkFileChooserDialog" id="usercert-chooser">
     <property name="can-focus">False</property>
-    <property name="title" translatable="yes">Choose a client certificate…</property>
     <property name="modal">True</property>
-    <property name="type-hint">dialog</property>
-    <child internal-child="vbox">
-      <object class="GtkBox">
+    <child type="titlebar">
+      <object class="GtkHeaderBar">
+        <property name="visible">True</property>
         <property name="can-focus">False</property>
-        <property name="orientation">vertical</property>
-        <property name="spacing">2</property>
-        <child internal-child="action_area">
-          <object class="GtkButtonBox">
+        <property name="show-close-button">False</property>
+        <child type="title">
+          <object class="GtkLabel">
+            <property name="label" translatable="yes">Choose a client certificate…</property>
+            <property name="visible">True</property>
             <property name="can-focus">False</property>
-            <property name="layout-style">end</property>
-            <child>
-              <object class="GtkButton" id="usercert-chooser-cancel">
-                <property name="label" translatable="yes">_Cancel</property>
-                <property name="visible">True</property>
-                <property name="can-focus">True</property>
-                <property name="receives-default">False</property>
-                <property name="use-underline">True</property>
-              </object>
-              <packing>
-                <property name="expand">True</property>
-                <property name="fill">True</property>
-                <property name="position">0</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkButton" id="usercert-chooser-accept">
-                <property name="label" translatable="yes">_Select</property>
-                <property name="visible">True</property>
-                <property name="can-focus">True</property>
-                <property name="can-default">True</property>
-                <property name="has-default">True</property>
-                <property name="receives-default">True</property>
-                <property name="use-underline">True</property>
-                <style>
-                  <class name="default"/>
-                  <class name="suggested-action"/>
-                </style>
-              </object>
-              <packing>
-                <property name="expand">True</property>
-                <property name="fill">True</property>
-                <property name="position">1</property>
-              </packing>
-            </child>
+            <style>
+              <class name="title"/>
+            </style>
           </object>
-          <packing>
-            <property name="expand">False</property>
-            <property name="fill">False</property>
-            <property name="position">0</property>
-          </packing>
         </child>
         <child>
-          <placeholder/>
+          <object class="GtkButton" id="usercert-chooser-cancel">
+            <property name="label" translatable="yes">_Cancel</property>
+            <property name="visible">True</property>
+            <property name="can-focus">True</property>
+            <property name="receives-default">False</property>
+            <property name="use-underline">True</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkButton" id="usercert-chooser-accept">
+            <property name="label" translatable="yes">_Select</property>
+            <property name="visible">True</property>
+            <property name="can-focus">True</property>
+            <property name="can-default">True</property>
+            <property name="has-default">True</property>
+            <property name="receives-default">True</property>
+            <property name="use-underline">True</property>
+            <style>
+              <class name="default"/>
+              <class name="suggested-action"/>
+            </style>
+          </object>
+          <packing>
+            <property name="position">1</property>
+            <property name="pack-type">end</property>
+          </packing>
         </child>
       </object>
     </child>
@@ -821,61 +797,49 @@
   </object>
   <object class="GtkFileChooserDialog" id="userkey-chooser">
     <property name="can-focus">False</property>
-    <property name="title" translatable="yes">Choose a private key…</property>
     <property name="modal">True</property>
-    <property name="type-hint">dialog</property>
-    <child internal-child="vbox">
-      <object class="GtkBox">
+    <child type="titlebar">
+      <object class="GtkHeaderBar">
+        <property name="visible">True</property>
         <property name="can-focus">False</property>
-        <property name="orientation">vertical</property>
-        <property name="spacing">2</property>
-        <child internal-child="action_area">
-          <object class="GtkButtonBox">
+        <property name="show-close-button">False</property>
+        <child type="title">
+          <object class="GtkLabel">
+            <property name="label" translatable="yes">Choose a private key…</property>
+            <property name="visible">True</property>
             <property name="can-focus">False</property>
-            <property name="layout-style">end</property>
-            <child>
-              <object class="GtkButton" id="userkey-chooser-cancel">
-                <property name="label" translatable="yes">_Cancel</property>
-                <property name="visible">True</property>
-                <property name="can-focus">True</property>
-                <property name="receives-default">False</property>
-                <property name="use-underline">True</property>
-              </object>
-              <packing>
-                <property name="expand">True</property>
-                <property name="fill">True</property>
-                <property name="position">0</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkButton" id="userkey-chooser-accept">
-                <property name="label" translatable="yes">_Select</property>
-                <property name="visible">True</property>
-                <property name="can-focus">True</property>
-                <property name="can-default">True</property>
-                <property name="has-default">True</property>
-                <property name="receives-default">True</property>
-                <property name="use-underline">True</property>
-                <style>
-                  <class name="default"/>
-                  <class name="suggested-action"/>
-                </style>
-              </object>
-              <packing>
-                <property name="expand">True</property>
-                <property name="fill">True</property>
-                <property name="position">1</property>
-              </packing>
-            </child>
+            <style>
+              <class name="title"/>
+            </style>
           </object>
-          <packing>
-            <property name="expand">False</property>
-            <property name="fill">False</property>
-            <property name="position">0</property>
-          </packing>
         </child>
         <child>
-          <placeholder/>
+          <object class="GtkButton" id="userkey-chooser-cancel">
+            <property name="label" translatable="yes">_Cancel</property>
+            <property name="visible">True</property>
+            <property name="can-focus">True</property>
+            <property name="receives-default">False</property>
+            <property name="use-underline">True</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkButton" id="userkey-chooser-accept">
+            <property name="label" translatable="yes">_Select</property>
+            <property name="visible">True</property>
+            <property name="can-focus">True</property>
+            <property name="can-default">True</property>
+            <property name="has-default">True</property>
+            <property name="receives-default">True</property>
+            <property name="use-underline">True</property>
+            <style>
+              <class name="default"/>
+              <class name="suggested-action"/>
+            </style>
+          </object>
+          <packing>
+            <property name="position">1</property>
+            <property name="pack-type">end</property>
+          </packing>
         </child>
       </object>
     </child>