diff --git a/collator/src/collator/do_collate.rs b/collator/src/collator/do_collate.rs
index 1f196a95d..53aeada49 100644
--- a/collator/src/collator/do_collate.rs
+++ b/collator/src/collator/do_collate.rs
@@ -73,11 +73,20 @@ impl CollatorStdImpl {
             .get_last_imported_anchor_ct_and_author()
             .unwrap();
 
-        // TODO: need to generate unique for each block
-        // generate seed from the chain_time from the anchor
-        let hash_bytes = sha2::Sha256::digest(next_chain_time.to_be_bytes());
+        // Generate unique rand seed from the anchor chain_time and the next block seqno
+        let hash_bytes = sha2::Sha256::digest(
+            [
+                next_chain_time.to_be_bytes().as_slice(),
+                working_state
+                    .next_block_id_short
+                    .seqno
+                    .to_be_bytes()
+                    .as_slice(),
+            ]
+            .concat(),
+        );
         let rand_seed = HashBytes::from_slice(hash_bytes.as_slice());
-        tracing::trace!(target: tracing_targets::COLLATOR, "rand_seed from chain time: {}", rand_seed);
+        tracing::trace!(target: tracing_targets::COLLATOR, "rand_seed from chain time and block seqno: {}", rand_seed);
 
         let is_masterchain = self.shard_id.is_masterchain();