diff --git a/.env.docker b/.env.docker
index 717b5809..c97ada00 100644
--- a/.env.docker
+++ b/.env.docker
@@ -52,3 +52,8 @@ OPENNEBULA_ENDPOINT=/RPC2
 SEED_DUMMY_DATA=True
 # Fixed dev login: dummy-admin@example.com / this password
 DUMMY_ADMIN_PASSWORD=dummy-admin
+# Integer settings (silence "failed to get env value" log lines)
+EMAIL_PORT=25
+CELERY_MAX_RETRIES=5
+FIRST_VM_ID_AFTER_EU_VAT=0
+MAX_TIME_TO_WAIT_FOR_VM_TERMINATE=15