diff --git a/pyproject.toml b/pyproject.toml
index 406cf72f..0b7822c6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,7 +11,7 @@ license = "MIT"
 
 [tool.poetry.dependencies]
 python = ">=3.7"
-numpy = ">=1.10.1"
+numpy = ">=1.10.1,<2.0.0"
 scipy = ">=1.0.0"
 pandas = ">=1.3.0"
 SoundFile = ">=0.10.0"