diff --git a/requirements.txt b/requirements.txt
index 4628a6ae..8a8eb039 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,4 +7,5 @@ tensorboardX
 matplotlib
 Pillow
 flask
-scipy
\ No newline at end of file
+scipy
+lws
\ No newline at end of file
diff --git a/setup.py b/setup.py
index 06afe37a..b0f1eae3 100644
--- a/setup.py
+++ b/setup.py
@@ -78,6 +78,7 @@ setup(name='TTS',
           "matplotlib",
           "Pillow",
           "flask",
+          "lws"
       ],
       extras_require={
           "bin": [