diff --git a/ci/envs/38-minimal.yaml b/ci/envs/38-minimal.yaml
index 71c4bde..5be08cb 100644
--- a/ci/envs/38-minimal.yaml
+++ b/ci/envs/38-minimal.yaml
@@ -3,7 +3,7 @@ channels:
   - conda-forge
 dependencies:
   - python=3.8
-  - scipy=1.7
+  - scipy=1.8
   - numpy=1.21
   - pandas=1.3
   - matplotlib=3.4
diff --git a/pointpats/geometry.py b/pointpats/geometry.py
index b9cd7ab..d493e9a 100644
--- a/pointpats/geometry.py
+++ b/pointpats/geometry.py
@@ -21,7 +21,7 @@
 
 HULL_TYPES = (
     numpy.ndarray,
-    spatial.qhull.ConvexHull,
+    spatial.ConvexHull,
 )
 
 ## Define default dispatches and special dispatches without GEOS
diff --git a/requirements.txt b/requirements.txt
index f8a3d9e..bc611a6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-scipy>=0.11
+scipy>=1.8.0
 numpy>=1.3
 pandas
 matplotlib