diff --git a/pyproject.toml b/pyproject.toml
index 409694cf..bd9d8b40 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -80,7 +80,7 @@ optional-dependencies.substrate = [
   "substrate-interface",
 ]
 optional-dependencies.tezos = [
-  "aleph-pytezos==0.1.1",
+  "aleph-pytezos==3.13.4",
   "pynacl",
 ]
 urls.Documentation = "https://aleph.im/"
diff --git a/tests/unit/test_chain_tezos.py b/tests/unit/test_chain_tezos.py
index 0beaffc9..96e52ca3 100644
--- a/tests/unit/test_chain_tezos.py
+++ b/tests/unit/test_chain_tezos.py
@@ -31,7 +31,7 @@ async def test_tezos_account(tezos_account: TezosAccount):
     message = Message("TEZOS", tezos_account.get_address(), "SomeType", "ItemHash")
     signed = await tezos_account.sign_message(asdict(message))
     assert signed["signature"]
-    assert len(signed["signature"]) == 188
+    assert len(signed["signature"]) == 187
 
     address = tezos_account.get_address()
     assert address is not None
@@ -40,7 +40,7 @@ async def test_tezos_account(tezos_account: TezosAccount):
 
     pubkey = tezos_account.get_public_key()
     assert isinstance(pubkey, str)
-    assert len(pubkey) == 55
+    assert len(pubkey) == 54
 
 
 @pytest.mark.asyncio