diff --git a/environment.yml b/environment.yml
index fcd796d..0089d71 100644
--- a/environment.yml
+++ b/environment.yml
@@ -9,7 +9,7 @@ dependencies:
     - "scikit-bio>=0.5"
     - "scikit-learn>=0.24"
     - numpy
-    - scipy
+    - "scipy<1.9"
     - h5py
     - matplotlib
     - pysam
diff --git a/setup.py b/setup.py
index beee85f..e86725b 100755
--- a/setup.py
+++ b/setup.py
@@ -147,7 +147,7 @@ def build_extensions(self):
     ],
     install_requires=[
         'numpy',
-        'scipy',
+        'scipy<1.9',
         'h5py',
         'intervaltree',
         'matplotlib',