diff --git a/pbs-client/src/http_client.rs b/pbs-client/src/http_client.rs
index 90d0d04b0..b803c19fa 100644
--- a/pbs-client/src/http_client.rs
+++ b/pbs-client/src/http_client.rs
@@ -764,6 +764,8 @@ impl HttpClient {
             );
         }
 
+        req.headers_mut()
+            .insert("Connection", HeaderValue::from_str("upgrade").unwrap());
         req.headers_mut()
             .insert("UPGRADE", HeaderValue::from_str(&protocol_name).unwrap());