diff --git a/compose/docker-compose-fixturenet-optimism.yml b/compose/docker-compose-fixturenet-optimism.yml
index 0115341..b2f59ab 100644
--- a/compose/docker-compose-fixturenet-optimism.yml
+++ b/compose/docker-compose-fixturenet-optimism.yml
@@ -49,6 +49,8 @@ services:
       - l2_config:/l2-config
     entrypoint: "bash"
     command: "/generate-l2-config.sh"
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
 
   # Initializes and runs the L2 execution client  (outputs to volume l2_geth_data)
   op-geth: