diff --git a/ui/gtk/menus.ui b/ui/gtk/menus.ui
index b1770de1..17eacb5d 100644
--- a/ui/gtk/menus.ui
+++ b/ui/gtk/menus.ui
@@ -1,37 +1,37 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
 <interface>
-  <menu id='app-menu'>
+  <menu id="app-menu">
     <section>
       <item>
-        <attribute name='label' translatable='yes'>Compose Message</attribute>
-        <attribute name='action'>app.compose</attribute>
+        <attribute name="label" translatable="yes">Compose Message</attribute>
+        <attribute name="action">app.compose</attribute>
       </item>
     </section>
     <section>
       <item>
-        <attribute name='label' translatable='yes'>A_ccounts</attribute>
-        <attribute name='action'>app.accounts</attribute>
+        <attribute name="label" translatable="yes">A_ccounts</attribute>
+        <attribute name="action">app.accounts</attribute>
       </item>
       <item>
-        <attribute name='label' translatable='yes'>_Preferences</attribute>
-        <attribute name='action'>app.preferences</attribute>
+        <attribute name="label" translatable="yes">_Preferences</attribute>
+        <attribute name="action">app.preferences</attribute>
       </item>
     </section>
     <section>
       <item>
-        <attribute name='label' translatable='yes'>_Help</attribute>
-        <attribute name='action'>app.help</attribute>
-        <attribute name='accel'>F1</attribute>
+        <attribute name="label" translatable="yes">_Help</attribute>
+        <attribute name="action">app.help</attribute>
+        <attribute name="accel">F1</attribute>
       </item>
       <item>
-        <attribute name='label' translatable='yes'>_About</attribute>
-        <attribute name='action'>app.about</attribute>
+        <attribute name="label" translatable="yes">_About</attribute>
+        <attribute name="action">app.about</attribute>
       </item>
       <item>
-        <attribute name='label' translatable='yes'>_Quit</attribute>
-        <attribute name='action'>app.quit</attribute>
-        <attribute name='accel'>&lt;Primary&gt;Q</attribute>
+        <attribute name="label" translatable="yes">_Quit</attribute>
+        <attribute name="action">app.quit</attribute>
+        <attribute name="accel">&lt;Primary&gt;Q</attribute>
       </item>
     </section>
   </menu>