diff --git a/requirements.txt b/requirements.txt
index 6fee7fd..c6ab562 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 bokeh==0.12.5
 keras>=2.0.0
-librosa
+librosa==0.4.2
 numpy
 pandas
 pyaudio