diff --git a/lib/phlexy_ui/base.rb b/lib/phlexy_ui/base.rb
index b876590..e85f5e9 100644
--- a/lib/phlexy_ui/base.rb
+++ b/lib/phlexy_ui/base.rb
@@ -24,6 +24,7 @@ def register_modifiers(modifiers)
 
     def modifiers
       {
+        skeleton: :skeleton,
         **self.class.modifiers,
         **PhlexyUI.configuration.modifiers.for(component: self.class),
         **PhlexyUI.configuration.modifiers.for(component: nil)
diff --git a/spec/lib/phlexy_ui/button_spec.rb b/spec/lib/phlexy_ui/button_spec.rb
index 955d1ee..d636911 100644
--- a/spec/lib/phlexy_ui/button_spec.rb
+++ b/spec/lib/phlexy_ui/button_spec.rb
@@ -233,6 +233,20 @@
       expect(output).to eq(expected_html)
     end
 
+    context "when using the :skeleton modifier" do
+      subject(:output) do
+        render described_class.new(:neutral, :skeleton)
+      end
+
+      it "renders it correctly" do
+        expected_html = html <<~HTML
+          <button class="btn btn-neutral skeleton"></button>
+        HTML
+
+        expect(output).to eq(expected_html)
+      end
+    end
+
     # TODO: Not needed once Phlex 2.0 is released.
     context "when passing malicious code via the block" do
       subject(:output) do