diff --git a/certbot-compose.yml b/certbot-compose.yml
index 19fe853..606f94a 100644
--- a/certbot-compose.yml
+++ b/certbot-compose.yml
@@ -29,7 +29,7 @@ services:
     --staging \
     --email ${REACT_APP_ADMIN_EMAIL} \
     -d ${DOMAIN_NAME} -d www.${DOMAIN_NAME} -d api.${DOMAIN_NAME} -d admin.${DOMAIN_NAME} \
-    --rsa-key-size $rsa_key_size \
+    --rsa-key-size 4096 \
     --agree-tos \
     --force-renewal"