diff --git a/Cargo.toml b/Cargo.toml
index de83e83..05dbc67 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -40,7 +40,7 @@ anyhow = "1.0"
 paste = "1.0"
 #num-complex = "0.3"
 netcdf = { version = "0.7", optional = true, default-features = false }
-pyo3 = { version = "0.23", optional = true, features = [
+pyo3 = { version = "0.22", optional = true, features = [
   "auto-initialize",
   "gil-refs",
 ] }