diff --git a/docker-compose.yaml b/docker-compose.yaml
index 4597119..516e00b 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -37,6 +37,7 @@ services:
     image: ${GECKODRIVER_IMG}
     shm_size: 2gb
     environment:
+      - SE_JAVA_OPTS=-Xmx4G
       - START_VNC=${HEADFULL-false} # as opposed to headless, used when requiring supervision (eg. for websites that crash)
       - START_XVFB=${HEADFULL-false}
       - SE_VNC_NO_PASSWORD=1