diff --git a/requirements.txt b/requirements.txt
index 2c6809e..af17117 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ soundfile>=0.10.3.post1
 tqdm>=4.46.1
 pysndfx>=0.3.6
 pandas>=1.0.1
-numpy>=1.18.1
+numpy>=1.18.1,<2.0
 pyloudnorm>=0.1.0
 scipy>=1.4.1
-matplotlib>=3.1.3
\ No newline at end of file
+matplotlib>=3.1.3