diff --git a/Makefile b/Makefile
index f7e79d4c..29fbc558 100644
--- a/Makefile
+++ b/Makefile
@@ -56,10 +56,10 @@ webapp:
 webapp-static: addon-packer
 	$(MAKE) clean-webapp-static
 # When changing the base URL, also update the line
-# e.GET("/app/*", echo.WrapHandler(webAppHandler))
+# e.GET("/app/v3/*", echo.WrapHandler(webAppHandler))
 # in `cmd/flamenco-manager/main.go`
-	yarn --cwd web/app build --outDir ../static --base=/app/
-# yarn --cwd web/app build --outDir ../static --base=/app/ --minify false
+	yarn --cwd web/app build --outDir ../static --base=/app/v3/
+# yarn --cwd web/app build --outDir ../static --base=/app/v3/ --minify false
 	./addon-packer -filename ${WEB_STATIC}/flamenco3-addon.zip
 	@echo "Web app has been installed into ${WEB_STATIC}"
 
diff --git a/cmd/flamenco-manager/main.go b/cmd/flamenco-manager/main.go
index 9fd0c843..98d8d2ff 100644
--- a/cmd/flamenco-manager/main.go
+++ b/cmd/flamenco-manager/main.go
@@ -298,15 +298,12 @@ func buildWebService(
 		})
 	}
 
-	// Serve static files for the webapp on /app/.
+	// Serve static files for the webapp on /app/v3/.
 	webAppHandler, err := web.WebAppHandler()
 	if err != nil {
 		log.Fatal().Err(err).Msg("unable to set up HTTP server for embedded web app")
 	}
-	e.GET("/app/*", echo.WrapHandler(http.StripPrefix("/app", webAppHandler)))
-	e.GET("/app", func(c echo.Context) error {
-		return c.Redirect(http.StatusTemporaryRedirect, "/app/")
-	})
+	e.GET("/app/v3/*", echo.WrapHandler(http.StripPrefix("/app/v3", webAppHandler)))
 
 	// Serve the Blender add-on. It's contained in the static files of the webapp.
 	e.GET("/flamenco3-addon.zip", echo.WrapHandler(webAppHandler))
@@ -321,10 +318,13 @@ func buildWebService(
 		Msg("serving job-specific files directly from disk")
 	e.Static(api_impl.JobFilesURLPrefix, localStorage.Root())
 
-	// Redirect / to the webapp.
-	e.GET("/", func(c echo.Context) error {
-		return c.Redirect(http.StatusTemporaryRedirect, "/app/")
-	})
+	// Redirect / and subsets of the webapp URL to the actual webapp URL.
+	redirectToWebapp := func(c echo.Context) error {
+		return c.Redirect(http.StatusTemporaryRedirect, "/app/v3/")
+	}
+	e.GET("/app/v3", redirectToWebapp)
+	e.GET("/app/", redirectToWebapp)
+	e.GET("/", redirectToWebapp)
 
 	// Log available routes
 	routeLogger := log.Level(zerolog.TraceLevel)
diff --git a/web/app/package.json b/web/app/package.json
index 50286456..a412fb73 100644
--- a/web/app/package.json
+++ b/web/app/package.json
@@ -12,7 +12,7 @@
     }
   ],
   "scripts": {
-    "dev": "vite --port 8081 --base /app/",
+    "dev": "vite --port 8081 --base /app/v3/",
     "build": "vite build",
     "preview": "vite preview --port 5050",
     "lint": "eslint . --ext .vue,.js,.jsx,.cjs,.mjs --fix --ignore-path .gitignore"
diff --git a/web/app/src/components/jobs/LastRenderedImage.vue b/web/app/src/components/jobs/LastRenderedImage.vue
index c4cc3e98..0e124b92 100644
--- a/web/app/src/components/jobs/LastRenderedImage.vue
+++ b/web/app/src/components/jobs/LastRenderedImage.vue
@@ -53,7 +53,7 @@ function setImageURL(thumbnailInfo) {
   if (thumbnailInfo == null) {
     // This indicates that there is no last-rendered image.
     // Default to a hard-coded 'nothing to be seen here, move along' image.
-    imageURL.value = "/app/nothing-rendered-yet.svg";
+    imageURL.value = "/app/v3/nothing-rendered-yet.svg";
     cssClasses['nothing-rendered-yet'] = true;
     console.log("LastRenderedImage.vue: setting image URL to:", imageURL.value);
     return;