diff --git a/validator-session/validator-session.hpp b/validator-session/validator-session.hpp
index b6a9ab0c..58058282 100644
--- a/validator-session/validator-session.hpp
+++ b/validator-session/validator-session.hpp
@@ -90,7 +90,7 @@ class ValidatorSessionImpl : public ValidatorSession {
   td::actor::ActorOwn<catchain::CatChain> catchain_;
   std::unique_ptr<ValidatorSessionDescription> description_;
 
-  double catchain_max_block_delay_ = 0.5;
+  double catchain_max_block_delay_ = 0.4;
 
   void on_new_round(td::uint32 round);
   void on_catchain_started();