diff --git a/README.md b/README.md
index 5314c16..8d714a1 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@ a Gtk notification server for Pantheon
 
 You'll need the following dependencies:
 * libcanberra
-* libgranite-7-dev (>=7.0.0)
+* libgranite-7-dev (>=7.7.0)
 * libgtk-4-dev
 * libadwaita-1-dev (>=1.0.0)
 * meson
diff --git a/meson.build b/meson.build
index a9e7ef3..3eb3a2f 100644
--- a/meson.build
+++ b/meson.build
@@ -33,7 +33,7 @@ executable(
         dependency ('glib-2.0'),
         dependency ('gobject-2.0'),
         dependency ('gio-2.0'),
-        dependency ('granite-7', version: '>=7.0.0'),
+        dependency ('granite-7', version: '>=7.7.0'),
         dependency ('gtk4'),
         dependency ('gtk4-x11'),
         dependency ('libadwaita-1')
diff --git a/src/Widgets/MaskedImage.vala b/src/Widgets/MaskedImage.vala
index e0eed83..939d234 100644
--- a/src/Widgets/MaskedImage.vala
+++ b/src/Widgets/MaskedImage.vala
@@ -37,9 +37,8 @@ public class Notifications.MaskedImage : Granite.Bin {
             pixel_size = ICON_SIZE
         };
 
-        add_css_class (Granite.STYLE_CLASS_CARD);
-        add_css_class (Granite.STYLE_CLASS_CHECKERBOARD);
-        add_css_class (Granite.STYLE_CLASS_ROUNDED);
+        add_css_class (Granite.CssClass.CARD);
+        add_css_class (Granite.CssClass.CHECKERBOARD);
         overflow = HIDDEN;
 
         child = image;