diff --git a/ct-web/src/components/Counter.ts b/ct-web/src/components/Counter.ts
index 3f2c7cd..422d128 100644
--- a/ct-web/src/components/Counter.ts
+++ b/ct-web/src/components/Counter.ts
@@ -1,7 +1,7 @@
 let remountCount = 0 
 
 export class Counter extends HTMLElement {
-  set count(count: string) {
+  set count(count: number) {
     this.innerHTML = `
       <div>
         <div id="props">${count}</div>
diff --git a/playwright-ct-web/index.d.ts b/playwright-ct-web/index.d.ts
index 1fef49d..eb13c51 100644
--- a/playwright-ct-web/index.d.ts
+++ b/playwright-ct-web/index.d.ts
@@ -39,26 +39,28 @@ type JsonValue = JsonPrimitive | JsonObject | JsonArray;
 type JsonArray = JsonValue[];
 type JsonObject = { [Key in string]?: JsonValue };
 
+// TODO: get props, probably by filter readonly and function types?
+type ComponentProps<Component extends HTMLElement> = Partial<Component>;
+
 type Slot = string | string[];
 
-export interface MountOptions {
-  props?: Props;
+export interface MountOptions<HooksConfig extends JsonObject, Component extends HTMLElement> {
+  props?: ComponentProps<Component>;
   slots?: Record<string, Slot> & { default?: Slot };
   on?: Record<string, Function>;
   hooksConfig?: HooksConfig;
 }
 
-interface MountResult<
-  Props extends Record<string, unknown>
-> extends Locator {
+interface MountResult<Component extends HTMLElement> extends Locator {
   unmount(): Promise<void>;
-  update(options: Omit<MountOptions<never, Props>, 'hooksConfig'>): Promise<void>;
+  update(options: Omit<MountOptions<never, Component>, 'hooksConfig'>): Promise<void>;
 }
 
 export interface ComponentFixtures {
-  mount<HooksConfig extends JsonObject>(
-    component: new (...args: any[]) => HTMLElement, options?: MountOptions
-  ): Promise<MountResult<any>>;
+  mount<HooksConfig extends JsonObject, Component extends HTMLElement = HTMLElement>(
+    component: new (...args: any[]) => Component,
+    options?: MountOptions<HooksConfig, Component>
+  ): Promise<MountResult<Component>>;
 }
 
 export const test: TestType<
diff --git a/playwright-ct-web/package.json b/playwright-ct-web/package.json
index 58f4cb6..7854ca5 100644
--- a/playwright-ct-web/package.json
+++ b/playwright-ct-web/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@sand4rt/experimental-ct-web",
-  "version": "0.0.8",
+  "version": "0.0.9",
   "description": "Playwright Component Testing for Web Components",
   "homepage": "https://playwright.dev",
   "engines": {