diff --git a/validator-engine/validator-engine.cpp b/validator-engine/validator-engine.cpp
index 23bb8f77..16f71d5d 100644
--- a/validator-engine/validator-engine.cpp
+++ b/validator-engine/validator-engine.cpp
@@ -1324,6 +1324,9 @@ td::Status ValidatorEngine::load_global_config() {
   for (auto seq : unsafe_catchains_) {
     validator_options_.write().add_unsafe_resync_catchain(seq);
   }
+  for (auto rot : unsafe_catchain_rotations_) {
+    validator_options_.write().add_unsafe_catchain_rotate(rot.first, rot.second.first, rot.second.second);
+  }
   if (truncate_seqno_ > 0) {
     validator_options_.write().truncate_db(truncate_seqno_);
   }
@@ -3364,6 +3367,18 @@ int main(int argc, char *argv[]) {
         acts.push_back([&x, seq]() { td::actor::send_closure(x, &ValidatorEngine::add_unsafe_catchain, seq); });
         return td::Status::OK();
       });
+  p.add_checked_option(
+      'F', "unsafe-catchain-rotate", "use forceful and DANGEROUS catchain rotation", [&](td::Slice params) {
+        auto pos1 = params.find(':');
+        TRY_RESULT(b_seq, td::to_integer_safe<ton::BlockSeqno>(params.substr(0, pos1)));
+        params = params.substr(++pos1, params.size());
+        auto pos2 = params.find(':');
+        TRY_RESULT(cc_seq, td::to_integer_safe<ton::CatchainSeqno>(params.substr(0, pos2)));
+        params = params.substr(++pos2, params.size());
+        auto h = std::stoi(params.substr(0, params.size()).str());
+        acts.push_back([&x, b_seq, cc_seq, h]() { td::actor::send_closure(x, &ValidatorEngine::add_unsafe_catchain_rotation, b_seq, cc_seq, h); });
+        return td::Status::OK();
+      });
   td::uint32 threads = 7;
   p.add_checked_option(
       't', "threads", PSTRING() << "number of threads (default=" << threads << ")", [&](td::Slice fname) {
diff --git a/validator-engine/validator-engine.hpp b/validator-engine/validator-engine.hpp
index e9634dd3..8ce56ab4 100644
--- a/validator-engine/validator-engine.hpp
+++ b/validator-engine/validator-engine.hpp
@@ -201,6 +201,7 @@ class ValidatorEngine : public td::actor::Actor {
   ton::BlockSeqno truncate_seqno_{0};
 
   std::set<ton::CatchainSeqno> unsafe_catchains_;
+  std::map<ton::BlockSeqno, std::pair<ton::CatchainSeqno, td::uint32>> unsafe_catchain_rotations_;
 
  public:
   static constexpr td::uint8 max_cat() {
@@ -210,6 +211,9 @@ class ValidatorEngine : public td::actor::Actor {
   void add_unsafe_catchain(ton::CatchainSeqno seq) {
     unsafe_catchains_.insert(seq);
   }
+  void add_unsafe_catchain_rotation(ton::BlockSeqno b_seqno, ton::CatchainSeqno cc_seqno, td::uint32 value) {
+    unsafe_catchain_rotations_.insert({b_seqno, {cc_seqno, value}});
+  }
   void set_local_config(std::string str);
   void set_global_config(std::string str);
   void set_fift_dir(std::string str) {