diff --git a/pyproject.toml b/pyproject.toml
index 050a624a..fd1dcdcb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -51,7 +51,7 @@ test = [
 optional = [
     "streamlit",
     "boto3",
-    "botorch",
+    "botorch>=0.8.1",
 ]
 
 preferential = [