diff --git a/README.md b/README.md
index 38185d5..135c11f 100644
--- a/README.md
+++ b/README.md
@@ -150,7 +150,8 @@ func main() {
 		RedisConnOpt: asynq.RedisClientOpt{Addr: ":6379"},
 	})
 
-	http.Handle(h.RootPath(), h)
+    // Note: We need the tailing slash when using net/http.ServeMux.
+	http.Handle(h.RootPath()+"/", h)
 
 	// Go to http://localhost:8080/monitoring to see asynqmon homepage.
 	log.Fatal(http.ListenAndServe(":8080", nil))
diff --git a/handler.go b/handler.go
index 4a440e8..0eb7cf6 100644
--- a/handler.go
+++ b/handler.go
@@ -78,8 +78,9 @@ func (h *HTTPHandler) Close() error {
 }
 
 // RootPath returns the root URL path used for asynqmon application.
+// Returned path string does not have the trailing slash.
 func (h *HTTPHandler) RootPath() string {
-	return h.rootPath + "/"
+	return h.rootPath
 }
 
 //go:embed ui/build/*