diff --git a/src/el/nethermind/nethermind_launcher.star b/src/el/nethermind/nethermind_launcher.star
index 41c422c06..4b8185987 100644
--- a/src/el/nethermind/nethermind_launcher.star
+++ b/src/el/nethermind/nethermind_launcher.star
@@ -159,7 +159,7 @@ def get_config(
         cmd.append("--config=" + launcher.network.split("-")[0])
         cmd.append("--Init.BaseDbPath=" + launcher.network.split("-")[0])
     elif launcher.network not in constants.PUBLIC_NETWORKS:
-        cmd.append("--config=none.cfg")
+        cmd.append("--config=none")
         cmd.append(
             "--Init.ChainSpecPath="
             + constants.GENESIS_CONFIG_MOUNT_PATH_ON_CONTAINER