diff --git a/pyproject.toml b/pyproject.toml
index 0bd5a5f..d960110 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,7 +30,7 @@ dependencies = [
   # cheminfo&bioinfo
   "rdkit",
   "biopython",
-  "openbabel-wheel",
+  "openbabel>=3.2.0",
   "biotite==1.0.1",
   # additional
   "gitpython",