diff --git a/Cargo.toml b/Cargo.toml
index 44ab228..2529a57 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -52,7 +52,7 @@ crate-type = ["cdylib"]
 version = "0.17.1"
 
 [dependencies.pyo3]
-version = "0.17.1"
+version = "0.18.2"
 features = ["extension-module"]
 
 [target.x86_64-apple-darwin]