diff --git a/srcts/src/components/_utils.ts b/srcts/src/components/_utils.ts
index 1150ec3c1..ef0ea71c8 100644
--- a/srcts/src/components/_utils.ts
+++ b/srcts/src/components/_utils.ts
@@ -2,8 +2,10 @@ import type { HtmlDep } from "rstudio-shiny/srcts/types/src/shiny/render";
 
 import type { InputBinding as InputBindingType } from "rstudio-shiny/srcts/types/src/bindings/input";
 
+import type { ShinyClass } from "rstudio-shiny/srcts/types/src";
+
 // eslint-disable-next-line @typescript-eslint/naming-convention
-const Shiny: typeof window.Shiny | undefined = window.Shiny;
+const Shiny: ShinyClass | undefined = window.Shiny;
 
 // Exclude undefined from T
 type NotUndefined<T> = T extends undefined ? never : T;
@@ -87,8 +89,8 @@ function getAllFocusableChildren(el: HTMLElement): HTMLElement[] {
 }
 
 async function shinyRenderContent(
-  ...args: Parameters<typeof window.Shiny.renderContentAsync>
-): ReturnType<typeof window.Shiny.renderContentAsync> {
+  ...args: Parameters<ShinyClass.renderContentAsync>
+): Promise<void> {
   if (!Shiny) {
     throw new Error("This function must be called in a Shiny app.");
   }
diff --git a/yarn.lock b/yarn.lock
index 8e383e881..62bddfa2e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -326,7 +326,7 @@
 
 "@types/rstudio-shiny@https://github.com/rstudio/shiny#init-promise":
   version "1.8.1-alpha.9001"
-  resolved "https://github.com/rstudio/shiny#5ca2c80083fb85478ab47088f46aa8fd2466a945"
+  resolved "https://github.com/rstudio/shiny#83d9cae6cc45a86489f2d2d068e65a443ba57d53"
   dependencies:
     "@types/bootstrap" "3.4.0"
     "@types/bootstrap-datepicker" "0.0.14"