diff --git a/R/client.R b/R/client.R
index 1cf9083a..880ae576 100644
--- a/R/client.R
+++ b/R/client.R
@@ -4,6 +4,13 @@ clientForAccount <- function(account) {
   serverUrl <- parseHttpUrl(serverInfo$url)
 
   if (isShinyappsServer(account$server)) {
+    # Disable httr2 for shinyapps.io. The shinyapps.io API returns 303
+    # redirects on several POST endpoints (updateBundleStatus,
+    # deployApplication), and httr2 drops the request body on redirect
+    # while keeping the X-Content-Checksum header, causing "bad checksum"
+    # and "Method Not Allowed" errors.
+    # See https://github.com/rstudio/rsconnect/issues/1297
+    options(rsconnect.httr2 = FALSE)
     shinyAppsClient(serverUrl, account)
   } else if (isPositConnectCloudServer(account$server)) {
     connectCloudClient(serverUrl, account)