diff --git a/src/gui/calendar-management/gcal-new-calendar-page.ui b/src/gui/calendar-management/gcal-new-calendar-page.ui
index 39165532..8949cecb 100644
--- a/src/gui/calendar-management/gcal-new-calendar-page.ui
+++ b/src/gui/calendar-management/gcal-new-calendar-page.ui
@@ -110,9 +110,9 @@
                               <object class="GtkLabel" id="web_sources_calendar_label">
                                 <property name="label" translatable="yes">Calendars</property>
                                 <property name="xalign">0</property>
-                                <attributes>
-                                  <attribute name="weight" value="bold" />
-                                </attributes>
+                                <style>
+                                  <class name="heading" />
+                                </style>
                               </object>
                             </child>
                             <child>
diff --git a/src/gui/gcal-event-popover.ui b/src/gui/gcal-event-popover.ui
index ea8b74d0..20f5ec42 100644
--- a/src/gui/gcal-event-popover.ui
+++ b/src/gui/gcal-event-popover.ui
@@ -104,12 +104,10 @@
         <child>
           <object class="GtkLabel" id="placeholder_label">
             <property name="vexpand">True</property>
-            <property name="label" translatable="yes">No event notes</property>
+            <property name="label" translatable="yes">&lt;i&gt;No event notes&lt;/i&gt;</property>
             <property name="margin-top">12</property>
             <property name="margin-bottom">12</property>
-            <attributes>
-              <attribute name="style" value="italic" />
-            </attributes>
+            <property name="use-markup">True</property>
             <style>
               <class name="dim-label" />
             </style>
diff --git a/src/gui/gcal-meeting-row.ui b/src/gui/gcal-meeting-row.ui
index 79bf9938..90d8fc72 100644
--- a/src/gui/gcal-meeting-row.ui
+++ b/src/gui/gcal-meeting-row.ui
@@ -15,9 +15,9 @@
             <child>
               <object class="GtkLabel" id="title">
                 <property name="halign">start</property>
-                <attributes>
-                  <attribute name="weight" value="bold" />
-                </attributes>
+                <style>
+                  <class name="heading" />
+                </style>
               </object>
             </child>
             <child>
diff --git a/src/gui/gcal-quick-add-popover.ui b/src/gui/gcal-quick-add-popover.ui
index 9581e833..59c7148a 100644
--- a/src/gui/gcal-quick-add-popover.ui
+++ b/src/gui/gcal-quick-add-popover.ui
@@ -26,9 +26,9 @@
                 <child>
                   <object class="GtkLabel" id="title_label">
                     <property name="hexpand">True</property>
-                    <attributes>
-                      <attribute name="weight" value="bold"/>
-                    </attributes>
+                    <style>
+                      <class name="heading" />
+                    </style>
                     <layout>
                       <property name="column">0</property>
                       <property name="row">0</property>
@@ -133,9 +133,9 @@
                     <child type="center">
                       <object class="GtkLabel">
                         <property name="label" translatable="yes">Calendar</property>
-                        <attributes>
-                          <attribute name="weight" value="bold"/>
-                        </attributes>
+                        <style>
+                          <class name="heading" />
+                        </style>
                       </object>
                     </child>
                   </object>