diff --git a/js/bybit.js b/js/bybit.js
index <HASH>..<HASH> 100644
--- a/js/bybit.js
+++ b/js/bybit.js
@@ -2041,7 +2041,7 @@ module.exports = class bybit extends Exchange {
             const timestamp = this.nonce ();
             const query = this.extend (params, {
                 'api_key': this.apiKey,
-                'recvWindow': this.options['recvWindow'],
+                'recv_window': this.options['recvWindow'],
                 'timestamp': timestamp,
             });
             const auth = this.rawencode (this.keysort (query));
Bybit recv_window query parameter fix

Noticed that in the api they snake case but when creating the query for signature camel case has been used. This makes that the options that one wants to apply are not valid.