diff --git a/docker/backend/start.sh b/docker/backend/start.sh
index 0ace54672..2c1c95a8b 100755
--- a/docker/backend/start.sh
+++ b/docker/backend/start.sh
@@ -62,7 +62,7 @@ __ESPLORA_RETRY_UNIX_SOCKET_AFTER__=${ESPLORA_RETRY_UNIX_SOCKET_AFTER:=30000}
 __ESPLORA_REQUEST_TIMEOUT__=${ESPLORA_REQUEST_TIMEOUT:=5000}
 __ESPLORA_FALLBACK_TIMEOUT__=${ESPLORA_FALLBACK_TIMEOUT:=5000}
 __ESPLORA_FALLBACK__=${ESPLORA_FALLBACK:=[]}
-__ESPLORA_MAX_BEHIND_TIP__=${ESPLORA_MAX_BEHIND_TIP:=[]}
+__ESPLORA_MAX_BEHIND_TIP__=${ESPLORA_MAX_BEHIND_TIP:=2}
 
 # SECOND_CORE_RPC
 __SECOND_CORE_RPC_HOST__=${SECOND_CORE_RPC_HOST:=127.0.0.1}