diff --git a/ts_web/elements/dees-stepper.ts b/ts_web/elements/dees-stepper.ts
index 21279bc..4f91932 100644
--- a/ts_web/elements/dees-stepper.ts
+++ b/ts_web/elements/dees-stepper.ts
@@ -16,6 +16,12 @@ export interface IStep {
   content: TemplateResult;
 }
 
+declare global {
+  interface HTMLElementTagNameMap {
+    'dees-stepper': DeesStepper;
+  }
+}
+
 @customElement('dees-stepper')
 export class DeesStepper extends DeesElement {
   public static demo = () => html` <dees-stepper></dees-stepper> `;