diff --git a/src/v1/api.rs b/src/v1/api.rs
index 4ee19e4..cbd6a4c 100644
--- a/src/v1/api.rs
+++ b/src/v1/api.rs
@@ -136,6 +136,9 @@ impl OpenAIClient {
         let url = format!("{}/{}", self.api_endpoint, path);
         let client = Client::builder();
 
+        #[cfg(feature = "rustls")]
+        let client = client.use_rustls_tls();
+
         let client = if let Some(timeout) = self.timeout {
             client.timeout(std::time::Duration::from_secs(timeout))
         } else {