diff --git a/da/dispersal.py b/da/dispersal.py
index 9bab1e6..b91405e 100644
--- a/da/dispersal.py
+++ b/da/dispersal.py
@@ -1,10 +1,9 @@
 from dataclasses import dataclass
-from hashlib import sha3_256
-from typing import List, Optional, Generator, Sequence
+from typing import List, Generator
 
-from da.common import Certificate, NodeId, BLSPublicKey, Bitfield, build_blob_id, NomosDaG2ProofOfPossession as bls_pop
+from da.common import NodeId
 from da.encoder import EncodedData
-from da.verifier import DABlob, Attestation
+from da.verifier import DABlob
 
 
 @dataclass
diff --git a/da/encoder.py b/da/encoder.py
index a2bb522..c837894 100644
--- a/da/encoder.py
+++ b/da/encoder.py
@@ -5,9 +5,9 @@ from hashlib import blake2b
 
 from eth2spec.eip7594.mainnet import KZGCommitment as Commitment, KZGProof as Proof, BLSFieldElement
 
-from da.common import ChunksMatrix, Chunk, Row, Column
+from da.common import ChunksMatrix, Chunk, Row
 from da.kzg_rs import kzg, rs
-from da.kzg_rs.common import GLOBAL_PARAMETERS, ROOTS_OF_UNITY, BLS_MODULUS, BYTES_PER_FIELD_ELEMENT
+from da.kzg_rs.common import GLOBAL_PARAMETERS, ROOTS_OF_UNITY, BYTES_PER_FIELD_ELEMENT
 from da.kzg_rs.poly import Polynomial
 
 
diff --git a/da/verifier.py b/da/verifier.py
index 1706b19..fa39c30 100644
--- a/da/verifier.py
+++ b/da/verifier.py
@@ -1,6 +1,6 @@
 from dataclasses import dataclass
 from hashlib import sha3_256
-from typing import List, Optional, Sequence, Set, Dict
+from typing import List, Sequence, Set
 
 from eth2spec.deneb.mainnet import BLSFieldElement
 from eth2spec.eip7594.mainnet import (