diff --git a/pyproject.toml b/pyproject.toml
index 49a00d4..b6a6f6d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "sw-utils"
-version = "v0.12.2"
+version = "v0.12.3"
 description = "StakeWise Python utils"
 authors = ["StakeWise Labs <info@stakewise.io>"]
 license = "GPL-3.0-or-later"
diff --git a/sw_utils/protocol_config.py b/sw_utils/protocol_config.py
index 89bf1c0..b4608cd 100644
--- a/sw_utils/protocol_config.py
+++ b/sw_utils/protocol_config.py
@@ -1,3 +1,5 @@
+from decimal import Decimal
+
 from web3 import Web3
 from web3.types import Wei
 
@@ -41,6 +43,12 @@ def build_protocol_config(
     )
     force_withdrawals_period = config_data.get('force_withdrawals_period', 24 * 60 * 60)
 
+    # Default value is based on historical APR, 0.23% adjustment
+    default_os_token_redeem_multiplier = Decimal('1.0023')
+    os_token_redeem_multiplier = Decimal(
+        config_data.get('os_token_redeem_multiplier', default_os_token_redeem_multiplier)
+    )
+
     return ProtocolConfig(
         oracles=oracles,
         rewards_threshold=rewards_threshold or 0,
@@ -60,4 +68,5 @@ def build_protocol_config(
         force_withdrawals_period=force_withdrawals_period,
         os_token_vaults_exit_limit_bps=os_token_vaults_exit_limit_bps,
         os_token_vaults=os_token_vaults,
+        os_token_redeem_multiplier=os_token_redeem_multiplier,
     )
diff --git a/sw_utils/tests/factories.py b/sw_utils/tests/factories.py
index eac3c09..4b8378f 100644
--- a/sw_utils/tests/factories.py
+++ b/sw_utils/tests/factories.py
@@ -1,8 +1,9 @@
 import random
 import string
+from decimal import Decimal
 from secrets import randbits
 
-from eth_typing import ChecksumAddress
+from eth_typing import ChecksumAddress, HexStr
 from faker import Faker
 from faker.providers import BaseProvider
 from py_ecc.bls import G2ProofOfPossession
@@ -25,27 +26,29 @@ def eth_address(self) -> ChecksumAddress:
         account = w3.eth.account.create()
         return account.address
 
-    def eth_proof(self) -> str:
-        # 32 bytes
-        return '0x' + ''.join(random.choices('abcdef' + string.digits, k=64))
+    def eth_proof(self) -> HexStr:
+        return Web3.to_hex(random.randbytes(32))
 
-    def validator_signature(self) -> str:
+    def merkle_root(self) -> HexStr:
+        return self.eth_proof()
+
+    def validator_signature(self) -> HexStr:
         # BLS signature, 96 bytes
-        return '0x' + ''.join(random.choices('abcdef' + string.digits, k=192))
+        return Web3.to_hex(random.randbytes(96))
 
-    def account_signature(self) -> str:
+    def account_signature(self) -> HexStr:
         # ECDSA signature, 65 bytes
-        return '0x' + ''.join(random.choices('abcdef' + string.digits, k=130))
+        return Web3.to_hex(random.randbytes(65))
 
-    def validator_public_key(self) -> str:
+    def validator_public_key(self) -> HexStr:
         # 48 bytes
-        return '0x' + ''.join(random.choices('abcdef' + string.digits, k=96))
+        return Web3.to_hex(random.randbytes(48))
 
-    def ecies_public_key(self) -> str:
+    def ecies_public_key(self) -> HexStr:
         # 64 bytes
-        return '0x' + ''.join(random.choices('abcdef' + string.digits, k=128))
+        return Web3.to_hex(random.randbytes(64))
 
-    def account_public_key(self) -> str:
+    def account_public_key(self) -> HexStr:
         # ECIES public key, 64 bytes
         return self.ecies_public_key()
 
@@ -87,6 +90,7 @@ def get_mocked_protocol_config(
     vault_fee_max_bps: int = 1500,  # 15%
     os_token_vaults_exit_limit_bps: int = 10_000,  # 100%
     os_token_vaults: list[str] | None = None,
+    os_token_redeem_multiplier: Decimal = Decimal('1.0023'),  # ~0.23% adjustment
 ) -> ProtocolConfig:
     return ProtocolConfig(
         oracles=oracles
@@ -116,4 +120,5 @@ def get_mocked_protocol_config(
         validators_threshold=validators_threshold,
         os_token_vaults_exit_limit_bps=os_token_vaults_exit_limit_bps,
         os_token_vaults=os_token_vaults or [],
+        os_token_redeem_multiplier=os_token_redeem_multiplier,
     )
diff --git a/sw_utils/typings.py b/sw_utils/typings.py
index fc52ba2..b9f5047 100644
--- a/sw_utils/typings.py
+++ b/sw_utils/typings.py
@@ -1,4 +1,5 @@
 from dataclasses import dataclass
+from decimal import Decimal
 from typing import Literal, NewType, TypeAlias
 
 from eth_keys.datatypes import PublicKey
@@ -77,6 +78,9 @@ class ProtocolConfig:
     # List of vaults used to determine osToken reward rate
     os_token_vaults: list[ChecksumAddress]
 
+    # Multiplier to adjust redemption assets to account for potential osToken rate increase
+    os_token_redeem_multiplier: Decimal
+
     # Keeper settings
     validators_threshold: int = 0
     rewards_threshold: int = 0