diff --git a/bittorrent/peer.go b/bittorrent/peer.go
index 5b55740..33935b7 100644
--- a/bittorrent/peer.go
+++ b/bittorrent/peer.go
@@ -11,6 +11,7 @@ import (
 	"net/netip"
 
 	"github.com/rs/zerolog"
+
 	"github.com/sot-tech/mochi/pkg/str2bytes"
 )
 
diff --git a/dist/example_config_lmdb.yaml b/dist/example_config_lmdb.yaml
index bc664bd..c5e983c 100644
--- a/dist/example_config_lmdb.yaml
+++ b/dist/example_config_lmdb.yaml
@@ -75,6 +75,10 @@ storage:
         # Maximum size of database, default is 1GiB
         max_size: 0
 
+        # Maximum number of threads/reader slots for the LMDB environment,
+        # default is 126.
+        max_readers: 0
+
         # Set MDB_WRITEMAP and MDB_MAPASYNC flags to use asynchronous flushes to disk.
         # The installation of the flag can highly speed up writes, but there is a risk of DB damage
         # or loss of last committed data if the application crashes.