diff --git a/modelcenter/PP-TTS/APP/requirements.txt b/modelcenter/PP-TTS/APP/requirements.txt
index cc9ab8f9c309864d62658d579abd0436b4a1b534..023ad28544b09c175e49b63e5b93415a2af3879f 100644
--- a/modelcenter/PP-TTS/APP/requirements.txt
+++ b/modelcenter/PP-TTS/APP/requirements.txt
@@ -1,3 +1,4 @@
 paddlepaddle==2.3.2
 paddleaudio==1.0.1
-paddlespeech==1.2.0
\ No newline at end of file
+paddlespeech==1.2.0
+gradio
\ No newline at end of file