diff --git a/overlay/overlay-peers.cpp b/overlay/overlay-peers.cpp
index 28dac8f05..8c4f5d228 100644
--- a/overlay/overlay-peers.cpp
+++ b/overlay/overlay-peers.cpp
@@ -100,7 +100,7 @@ void OverlayImpl::add_peer_in(OverlayNode node) {
     return;
   }
   auto t = td::Clocks::system();
-  if (node.version() + 600 < t || node.version() > t + 60) {
+  if (node.version() + Overlays::overlay_peer_ttl() < t || node.version() > t + 60) {
     VLOG(OVERLAY_INFO) << this << ": ignoring node of too old version " << node.version();
     return;
   }
@@ -231,7 +231,7 @@ void OverlayImpl::update_neighbours(td::uint32 nodes_to_change) {
       continue;
     }
 
-    if (X->get_version() <= td::Clocks::system() - 600) {
+    if (X->get_version() <= td::Clocks::system() - Overlays::overlay_peer_ttl()) {
       if (X->is_neighbour()) {
         bool found = false;
         for (auto &n : neighbours_) {
diff --git a/overlay/overlays.h b/overlay/overlays.h
index 1141efee2..cf153c3a5 100644
--- a/overlay/overlays.h
+++ b/overlay/overlays.h
@@ -187,6 +187,10 @@ class Overlays : public td::actor::Actor {
     return 1;
   }
 
+  static constexpr td::uint32 overlay_peer_ttl() {
+    return 600;
+  }
+
   static td::actor::ActorOwn<Overlays> create(std::string db_root, td::actor::ActorId<keyring::Keyring> keyring,
                                               td::actor::ActorId<adnl::Adnl> adnl, td::actor::ActorId<dht::Dht> dht);
 
diff --git a/validator/full-node.cpp b/validator/full-node.cpp
index 669e2fd97..cfe493667 100644
--- a/validator/full-node.cpp
+++ b/validator/full-node.cpp
@@ -27,7 +27,7 @@ namespace validator {
 
 namespace fullnode {
 
-static const double INACTIVE_SHARD_TTL = 120.0;
+static const double INACTIVE_SHARD_TTL = (double)overlay::Overlays::overlay_peer_ttl() + 60.0;
 
 void FullNodeImpl::add_permanent_key(PublicKeyHash key, td::Promise<td::Unit> promise) {
   if (local_keys_.count(key)) {