diff --git a/docker/backend/mempool-config.json b/docker/backend/mempool-config.json
index f0579e75f..c26b76f0a 100644
--- a/docker/backend/mempool-config.json
+++ b/docker/backend/mempool-config.json
@@ -15,7 +15,7 @@
     "PRICE_FEED_UPDATE_INTERVAL": __MEMPOOL_PRICE_FEED_UPDATE_INTERVAL__,
     "USE_SECOND_NODE_FOR_MINFEE": __MEMPOOL_USE_SECOND_NODE_FOR_MINFEE__,
     "EXTERNAL_ASSETS": __MEMPOOL_EXTERNAL_ASSETS__,
-    "STDOUT_LOG_MIN_PRIORITY": __MEMPOOL_STDOUT_LOG_MIN_PRIORITY__
+    "STDOUT_LOG_MIN_PRIORITY": "__MEMPOOL_STDOUT_LOG_MIN_PRIORITY__"
   },
   "CORE_RPC": {
     "HOST": "__CORE_RPC_HOST__",