diff --git a/backend/mempool-config.sample.json b/backend/mempool-config.sample.json
index 4650c1e64..ce403e943 100644
--- a/backend/mempool-config.sample.json
+++ b/backend/mempool-config.sample.json
@@ -28,7 +28,7 @@
     "POOLS_JSON_URL": "https://raw.githubusercontent.com/mempool/mining-pools/master/pools-v2.json",
     "POOLS_JSON_TREE_URL": "https://api.github.com/repos/mempool/mining-pools/git/trees/master",
     "AUDIT": false,
-    "RUST_GBT": false,
+    "RUST_GBT": true,
     "LIMIT_GBT": false,
     "CPFP_INDEXING": false,
     "DISK_CACHE_BLOCK_INTERVAL": 6,
diff --git a/backend/src/config.ts b/backend/src/config.ts
index b0afe7f23..a3e0a40af 100644
--- a/backend/src/config.ts
+++ b/backend/src/config.ts
@@ -193,7 +193,7 @@ const defaults: IConfig = {
     'POOLS_JSON_URL': 'https://raw.githubusercontent.com/mempool/mining-pools/master/pools-v2.json',
     'POOLS_JSON_TREE_URL': 'https://api.github.com/repos/mempool/mining-pools/git/trees/master',
     'AUDIT': false,
-    'RUST_GBT': false,
+    'RUST_GBT': true,
     'LIMIT_GBT': false,
     'CPFP_INDEXING': false,
     'MAX_BLOCKS_BULK_QUERY': 0,
diff --git a/docker/backend/start.sh b/docker/backend/start.sh
index 8033531ef..39ca95a2a 100755
--- a/docker/backend/start.sh
+++ b/docker/backend/start.sh
@@ -30,7 +30,7 @@ __MEMPOOL_AUTOMATIC_POOLS_UPDATE__=${MEMPOOL_AUTOMATIC_POOLS_UPDATE:=false}
 __MEMPOOL_POOLS_JSON_URL__=${MEMPOOL_POOLS_JSON_URL:=https://raw.githubusercontent.com/mempool/mining-pools/master/pools-v2.json}
 __MEMPOOL_POOLS_JSON_TREE_URL__=${MEMPOOL_POOLS_JSON_TREE_URL:=https://api.github.com/repos/mempool/mining-pools/git/trees/master}
 __MEMPOOL_AUDIT__=${MEMPOOL_AUDIT:=false}
-__MEMPOOL_RUST_GBT__=${MEMPOOL_RUST_GBT:=false}
+__MEMPOOL_RUST_GBT__=${MEMPOOL_RUST_GBT:=true}
 __MEMPOOL_LIMIT_GBT__=${MEMPOOL_LIMIT_GBT:=false}
 __MEMPOOL_CPFP_INDEXING__=${MEMPOOL_CPFP_INDEXING:=false}
 __MEMPOOL_MAX_BLOCKS_BULK_QUERY__=${MEMPOOL_MAX_BLOCKS_BULK_QUERY:=0}