diff --git a/src/DefaultPeerStorage.cc b/src/DefaultPeerStorage.cc
index 95a05a8c..235f2c5d 100644
--- a/src/DefaultPeerStorage.cc
+++ b/src/DefaultPeerStorage.cc
@@ -53,7 +53,7 @@ namespace aria2 {
 
 namespace {
 
-const size_t MAX_PEER_LIST_SIZE = 128;
+const size_t MAX_PEER_LIST_SIZE = 512;
 const size_t MAX_PEER_LIST_UPDATE = 100;
 
 } // namespace