diff --git a/sw_utils/protocol_config.py b/sw_utils/protocol_config.py
index 6205abf..cab2acb 100644
--- a/sw_utils/protocol_config.py
+++ b/sw_utils/protocol_config.py
@@ -1,3 +1,4 @@
+from web3 import Web3
 from web3.types import Wei
 
 from sw_utils.typings import Oracle, ProtocolConfig
@@ -31,6 +32,9 @@ def build_protocol_config(
         raise ValueError('Invalid exit signature threshold')
 
     vault_exiting_validators_limit_bps = config_data.get('vault_exiting_validators_limit_bps') or 0
+    os_token_vaults = [
+        Web3.to_checksum_address(v) for v in config_data.get('os_token_vaults') or []
+    ]
 
     return ProtocolConfig(
         oracles=oracles,
@@ -48,4 +52,5 @@ def build_protocol_config(
         signature_validity_period=config_data['signature_validity_period'],
         until_force_exit_epochs=config_data['until_force_exit_epochs'],
         vault_exiting_validators_limit_bps=vault_exiting_validators_limit_bps,
+        os_token_vaults=os_token_vaults,
     )
diff --git a/sw_utils/tests/factories.py b/sw_utils/tests/factories.py
index a2d7693..774573e 100644
--- a/sw_utils/tests/factories.py
+++ b/sw_utils/tests/factories.py
@@ -48,7 +48,7 @@ def wei_amount(self, start: int = 10, stop: int = 1000) -> Wei:
 faker.add_provider(Web3Provider)
 
 
-# pylint: disable=too-many-arguments
+# pylint: disable=too-many-arguments, too-many-positional-arguments, too-many-locals
 def get_mocked_protocol_config(
     oracles: list[Oracle] | None = None,
     oracles_count: int = 1,
@@ -64,6 +64,8 @@ def get_mocked_protocol_config(
     inactive_validator_balance: Wei = Web3.to_wei(31.75, 'ether'),
     validator_min_active_epochs: int = 2250,  # 10 days
     vault_fee_max_bps: int = 1500,  # 15%
+    vault_exiting_validators_limit_bps: int = 0,
+    os_token_vaults: list[str] | None = None,
 ) -> ProtocolConfig:
     return ProtocolConfig(
         oracles=oracles
@@ -89,4 +91,6 @@ def get_mocked_protocol_config(
         until_force_exit_epochs=until_force_exit_epochs,
         rewards_threshold=rewards_threshold,
         validators_threshold=validators_threshold,
+        vault_exiting_validators_limit_bps=vault_exiting_validators_limit_bps,
+        os_token_vaults=os_token_vaults or [],
     )
diff --git a/sw_utils/typings.py b/sw_utils/typings.py
index 7f5ed64..5b30a0a 100644
--- a/sw_utils/typings.py
+++ b/sw_utils/typings.py
@@ -65,9 +65,12 @@ class ProtocolConfig:
 
     exit_signature_recover_threshold: int
 
-    # max exiting validators bps for genesis vault
-    # zero value means limit is not set
-    vault_exiting_validators_limit_bps: int = 0
+    # Max exiting validators bps for genesis vault.
+    # Zero value means limit is not set.
+    vault_exiting_validators_limit_bps: int
+
+    # List of vaults used to determine osToken reward rate
+    os_token_vaults: list[ChecksumAddress]
 
     # Keeper settings
     validators_threshold: int = 0