diff --git a/src/Components/Viewer.tsx b/src/Components/Viewer.tsx
index adefea43..0d591d98 100644
--- a/src/Components/Viewer.tsx
+++ b/src/Components/Viewer.tsx
@@ -56,7 +56,7 @@ function setupAppProxyPath(proxy: PyodideProxy | WebRProxy): {
 function createHttpRequestChannel(
   proxy: PyodideProxy | WebRProxy,
   appName: string,
-  urlPath: string
+  urlPath: string,
 ): MessageChannel {
   if (!navigator.serviceWorker.controller) {
     throw new Error("ServiceWorker controller was not found!");
@@ -79,7 +79,7 @@ function createHttpRequestChannel(
       type: "configureProxyPath",
       path: urlPath,
     },
-    [httpRequestChannel.port2]
+    [httpRequestChannel.port2],
   );
 
   return httpRequestChannel;
@@ -88,7 +88,7 @@ function createHttpRequestChannel(
 async function resetPyAppFrame(
   pyodide: PyodideProxy,
   appName: string,
-  appFrame: HTMLIFrameElement
+  appFrame: HTMLIFrameElement,
 ): Promise<void> {
   // Reset the app iframe before shutting down the app, so that the user doesn't
   // see the flash of gray indicating a closed session.
@@ -96,7 +96,7 @@ async function resetPyAppFrame(
 
   const stoppedPreviousApp = (await pyodide.runPyAsync(
     `_stop_app('${appName}')`,
-    { returnResult: "value", printResult: false }
+    { returnResult: "value", printResult: false },
   )) as boolean;
 
   // If we stopped a previously-running app, pause for a bit before continuing.
@@ -108,7 +108,7 @@ async function resetPyAppFrame(
 async function resetRAppFrame(
   webRProxy: WebRProxy,
   appName: string,
-  appFrame: HTMLIFrameElement
+  appFrame: HTMLIFrameElement,
 ): Promise<void> {
   // Reset the app iframe before shutting down the app, so that the user doesn't
   // see the flash of gray indicating a closed session.
@@ -136,7 +136,7 @@ export function Viewer({
   >("loading");
   const shinyIntervalRef = React.useRef<number>(0);
   const [lastErrorMessage, setLastErrorMessage] = React.useState<string | null>(
-    null
+    null,
   );
 
   // Shiny for R
@@ -171,8 +171,8 @@ export function Viewer({
           Object.fromEntries(
             appCode.map((file) => {
               return [file.name, file.content];
-            })
-          )
+            }),
+          ),
         );
         try {
           await webRProxy.runRAsync(".save_files(files, appDir)", {
@@ -195,7 +195,7 @@ export function Viewer({
           webRProxy.runRAsync(".shiny_tick()");
         }, 100);
 
-        viewerFrameRef.current.src = appInfo.urlPath;
+        viewerFrameRef.current.src = appInfo.urlPath + window.location.search;
         setAppRunningState("running");
       } catch (e) {
         setAppRunningState("errored");
@@ -264,7 +264,7 @@ export function Viewer({
           args: [appName],
         });
 
-        viewerFrameRef.current.src = appInfo.urlPath;
+        viewerFrameRef.current.src = appInfo.urlPath + window.location.search;
         setAppRunningState("running");
       } catch (e) {
         setAppRunningState("errored");
@@ -283,7 +283,7 @@ export function Viewer({
       await resetPyAppFrame(
         pyodideproxy,
         appInfo.appName,
-        viewerFrameRef.current
+        viewerFrameRef.current,
       );
       setAppRunningState("empty");
     }