diff --git a/examples/binary-options/operator_create_market.py b/examples/binary-options/operator_create_market.py
index c53c54a..84357b3 100644
--- a/examples/binary-options/operator_create_market.py
+++ b/examples/binary-options/operator_create_market.py
@@ -48,7 +48,7 @@ async def main():
             executed = await tx_api.tx(by="hash", value=tx_hash.tx_hash)
         except lighter.ApiException:
             continue
-        print(f"public market index: {json.loads(executed.event_info)['m']}")
+        print(f"market index: {json.loads(executed.event_info)['m']}")
         break
 
     await client.close()
diff --git a/examples/binary-options/operator_settle_market.py b/examples/binary-options/operator_settle_market.py
index ffd67cf..91c4583 100644
--- a/examples/binary-options/operator_settle_market.py
+++ b/examples/binary-options/operator_settle_market.py
@@ -2,7 +2,7 @@
 from examples.utils import default_example_setup
 
 MARKET_SLOT = 1900
-PUBLIC_MARKET_INDEX = 0  # from operator_create_market.py
+MARKET_INDEX = 0  # from operator_create_market.py
 SETTLEMENT_CAP = 100
 
 
@@ -13,7 +13,7 @@ async def main():
     # To void the market instead: settlement_price=0, is_refund=1 (everyone is paid default_price).
     tx, tx_hash, err = await client.binary_options_operator_settle_market(
         market_slot=MARKET_SLOT,
-        public_market_index=PUBLIC_MARKET_INDEX,
+        market_index=MARKET_INDEX,
         settlement_price=SETTLEMENT_CAP,
         is_refund=0,
     )
diff --git a/lighter/signer_client.py b/lighter/signer_client.py
index 02c6a3b..eeb1c8f 100644
--- a/lighter/signer_client.py
+++ b/lighter/signer_client.py
@@ -67,7 +67,7 @@ class BinaryOptionsOperatorCreateMarketTxReq(ctypes.Structure):
 class BinaryOptionsOperatorUpdateMarketTxReq(ctypes.Structure):
     _fields_ = [
         ("MarketSlot", ctypes.c_int16),
-        ("PublicMarketIndex", ctypes.c_longlong),
+        ("MarketIndex", ctypes.c_longlong),
         ("StartTimestampMs", ctypes.c_longlong),
         ("EndTimestampMs", ctypes.c_longlong),
         ("TakerFee", ctypes.c_uint32),
@@ -83,7 +83,7 @@ class BinaryOptionsOperatorUpdateMarketTxReq(ctypes.Structure):
 class BinaryOptionsOperatorSettleMarketTxReq(ctypes.Structure):
     _fields_ = [
         ("MarketSlot", ctypes.c_int16),
-        ("PublicMarketIndex", ctypes.c_longlong),
+        ("MarketIndex", ctypes.c_longlong),
         ("SettlementPrice", ctypes.c_uint32),
         ("IsRefund", ctypes.c_uint8),
     ]
@@ -746,10 +746,10 @@ def sign_binary_options_operator_create_market(self, market_slot: int, start_tim
         )
         return self.__decode_tx_info(self.signer.SignBinaryOptionsOperatorCreateMarket(ctypes.byref(req), skip_nonce, nonce, api_key_index, self.account_index))
 
-    def sign_binary_options_operator_update_market(self, market_slot: int, public_market_index: int, start_timestamp_ms: int, end_timestamp_ms: int, taker_fee: int, maker_fee: int, min_base_amount: int, min_quote_amount: int, order_quote_limit: int, open_interest_limit: int, is_frozen: int, skip_nonce: int = SKIP_NONCE_OFF, nonce: int = DEFAULT_NONCE, api_key_index: int = DEFAULT_API_KEY_INDEX) -> Union[Tuple[str, str, str, None], Tuple[None, None, None, str]]:
+    def sign_binary_options_operator_update_market(self, market_slot: int, market_index: int, start_timestamp_ms: int, end_timestamp_ms: int, taker_fee: int, maker_fee: int, min_base_amount: int, min_quote_amount: int, order_quote_limit: int, open_interest_limit: int, is_frozen: int, skip_nonce: int = SKIP_NONCE_OFF, nonce: int = DEFAULT_NONCE, api_key_index: int = DEFAULT_API_KEY_INDEX) -> Union[Tuple[str, str, str, None], Tuple[None, None, None, str]]:
         req = BinaryOptionsOperatorUpdateMarketTxReq(
             MarketSlot=market_slot,
-            PublicMarketIndex=public_market_index,
+            MarketIndex=market_index,
             StartTimestampMs=start_timestamp_ms,
             EndTimestampMs=end_timestamp_ms,
             TakerFee=taker_fee,
@@ -762,10 +762,10 @@ def sign_binary_options_operator_update_market(self, market_slot: int, public_ma
         )
         return self.__decode_tx_info(self.signer.SignBinaryOptionsOperatorUpdateMarket(ctypes.byref(req), skip_nonce, nonce, api_key_index, self.account_index))
 
-    def sign_binary_options_operator_settle_market(self, market_slot: int, public_market_index: int, settlement_price: int, is_refund: int, skip_nonce: int = SKIP_NONCE_OFF, nonce: int = DEFAULT_NONCE, api_key_index: int = DEFAULT_API_KEY_INDEX) -> Union[Tuple[str, str, str, None], Tuple[None, None, None, str]]:
+    def sign_binary_options_operator_settle_market(self, market_slot: int, market_index: int, settlement_price: int, is_refund: int, skip_nonce: int = SKIP_NONCE_OFF, nonce: int = DEFAULT_NONCE, api_key_index: int = DEFAULT_API_KEY_INDEX) -> Union[Tuple[str, str, str, None], Tuple[None, None, None, str]]:
         req = BinaryOptionsOperatorSettleMarketTxReq(
             MarketSlot=market_slot,
-            PublicMarketIndex=public_market_index,
+            MarketIndex=market_index,
             SettlementPrice=settlement_price,
             IsRefund=is_refund,
         )
@@ -1510,9 +1510,9 @@ async def binary_options_operator_create_market(self, market_slot: int, start_ti
         return tx_info, api_response, None
 
     @process_api_key_and_nonce
-    async def binary_options_operator_update_market(self, market_slot: int, public_market_index: int, start_timestamp_ms: int, end_timestamp_ms: int, taker_fee: int, maker_fee: int, min_base_amount: int, min_quote_amount: int, order_quote_limit: int, open_interest_limit: int, is_frozen: int, skip_nonce: int = SKIP_NONCE_OFF, nonce: int = DEFAULT_NONCE, api_key_index: int = DEFAULT_API_KEY_INDEX):
+    async def binary_options_operator_update_market(self, market_slot: int, market_index: int, start_timestamp_ms: int, end_timestamp_ms: int, taker_fee: int, maker_fee: int, min_base_amount: int, min_quote_amount: int, order_quote_limit: int, open_interest_limit: int, is_frozen: int, skip_nonce: int = SKIP_NONCE_OFF, nonce: int = DEFAULT_NONCE, api_key_index: int = DEFAULT_API_KEY_INDEX):
         tx_type, tx_info, tx_hash, error = self.sign_binary_options_operator_update_market(
-            market_slot, public_market_index, start_timestamp_ms, end_timestamp_ms, taker_fee, maker_fee, min_base_amount, min_quote_amount, order_quote_limit, open_interest_limit, is_frozen, skip_nonce, nonce, api_key_index
+            market_slot, market_index, start_timestamp_ms, end_timestamp_ms, taker_fee, maker_fee, min_base_amount, min_quote_amount, order_quote_limit, open_interest_limit, is_frozen, skip_nonce, nonce, api_key_index
         )
         if error is not None:
             return None, None, error
@@ -1520,9 +1520,9 @@ async def binary_options_operator_update_market(self, market_slot: int, public_m
         return tx_info, api_response, None
 
     @process_api_key_and_nonce
-    async def binary_options_operator_settle_market(self, market_slot: int, public_market_index: int, settlement_price: int, is_refund: int, skip_nonce: int = SKIP_NONCE_OFF, nonce: int = DEFAULT_NONCE, api_key_index: int = DEFAULT_API_KEY_INDEX):
+    async def binary_options_operator_settle_market(self, market_slot: int, market_index: int, settlement_price: int, is_refund: int, skip_nonce: int = SKIP_NONCE_OFF, nonce: int = DEFAULT_NONCE, api_key_index: int = DEFAULT_API_KEY_INDEX):
         tx_type, tx_info, tx_hash, error = self.sign_binary_options_operator_settle_market(
-            market_slot, public_market_index, settlement_price, is_refund, skip_nonce, nonce, api_key_index
+            market_slot, market_index, settlement_price, is_refund, skip_nonce, nonce, api_key_index
         )
         if error is not None:
             return None, None, error
diff --git a/lighter/signers/lighter-signer-darwin-amd64.dylib b/lighter/signers/lighter-signer-darwin-amd64.dylib
index f01d922..fe0a324 100644
Binary files a/lighter/signers/lighter-signer-darwin-amd64.dylib and b/lighter/signers/lighter-signer-darwin-amd64.dylib differ
diff --git a/lighter/signers/lighter-signer-darwin-amd64.h b/lighter/signers/lighter-signer-darwin-amd64.h
index 54d4ac2..ba118c6 100644
--- a/lighter/signers/lighter-signer-darwin-amd64.h
+++ b/lighter/signers/lighter-signer-darwin-amd64.h
@@ -76,7 +76,7 @@ typedef struct {
 
 typedef struct {
     int16_t MarketSlot;
-    int64_t PublicMarketIndex;
+    int64_t MarketIndex;
     int64_t StartTimestampMs;
     int64_t EndTimestampMs;
     uint32_t TakerFee;
@@ -90,7 +90,7 @@ typedef struct {
 
 typedef struct {
     int16_t MarketSlot;
-    int64_t PublicMarketIndex;
+    int64_t MarketIndex;
     uint32_t SettlementPrice;
     uint8_t IsRefund;
 } BinaryOptionsOperatorSettleMarketTxReq;
diff --git a/lighter/signers/lighter-signer-darwin-arm64.dylib b/lighter/signers/lighter-signer-darwin-arm64.dylib
index 63f18e3..fd7ace2 100644
Binary files a/lighter/signers/lighter-signer-darwin-arm64.dylib and b/lighter/signers/lighter-signer-darwin-arm64.dylib differ
diff --git a/lighter/signers/lighter-signer-darwin-arm64.h b/lighter/signers/lighter-signer-darwin-arm64.h
index d03f38d..7563c47 100644
--- a/lighter/signers/lighter-signer-darwin-arm64.h
+++ b/lighter/signers/lighter-signer-darwin-arm64.h
@@ -78,7 +78,7 @@ typedef struct {
 
 typedef struct {
     int16_t MarketSlot;
-    int64_t PublicMarketIndex;
+    int64_t MarketIndex;
     int64_t StartTimestampMs;
     int64_t EndTimestampMs;
     uint32_t TakerFee;
@@ -92,7 +92,7 @@ typedef struct {
 
 typedef struct {
     int16_t MarketSlot;
-    int64_t PublicMarketIndex;
+    int64_t MarketIndex;
     uint32_t SettlementPrice;
     uint8_t IsRefund;
 } BinaryOptionsOperatorSettleMarketTxReq;
diff --git a/lighter/signers/lighter-signer-linux-amd64.h b/lighter/signers/lighter-signer-linux-amd64.h
index 5830d8e..305e94b 100644
--- a/lighter/signers/lighter-signer-linux-amd64.h
+++ b/lighter/signers/lighter-signer-linux-amd64.h
@@ -76,7 +76,7 @@ typedef struct {
 
 typedef struct {
     int16_t MarketSlot;
-    int64_t PublicMarketIndex;
+    int64_t MarketIndex;
     int64_t StartTimestampMs;
     int64_t EndTimestampMs;
     uint32_t TakerFee;
@@ -90,7 +90,7 @@ typedef struct {
 
 typedef struct {
     int16_t MarketSlot;
-    int64_t PublicMarketIndex;
+    int64_t MarketIndex;
     uint32_t SettlementPrice;
     uint8_t IsRefund;
 } BinaryOptionsOperatorSettleMarketTxReq;
diff --git a/lighter/signers/lighter-signer-linux-amd64.so b/lighter/signers/lighter-signer-linux-amd64.so
index 61b41fa..f10d24d 100644
Binary files a/lighter/signers/lighter-signer-linux-amd64.so and b/lighter/signers/lighter-signer-linux-amd64.so differ
diff --git a/lighter/signers/lighter-signer-linux-arm64.h b/lighter/signers/lighter-signer-linux-arm64.h
index 5830d8e..305e94b 100644
--- a/lighter/signers/lighter-signer-linux-arm64.h
+++ b/lighter/signers/lighter-signer-linux-arm64.h
@@ -76,7 +76,7 @@ typedef struct {
 
 typedef struct {
     int16_t MarketSlot;
-    int64_t PublicMarketIndex;
+    int64_t MarketIndex;
     int64_t StartTimestampMs;
     int64_t EndTimestampMs;
     uint32_t TakerFee;
@@ -90,7 +90,7 @@ typedef struct {
 
 typedef struct {
     int16_t MarketSlot;
-    int64_t PublicMarketIndex;
+    int64_t MarketIndex;
     uint32_t SettlementPrice;
     uint8_t IsRefund;
 } BinaryOptionsOperatorSettleMarketTxReq;
diff --git a/lighter/signers/lighter-signer-linux-arm64.so b/lighter/signers/lighter-signer-linux-arm64.so
index 19ab461..acf644f 100644
Binary files a/lighter/signers/lighter-signer-linux-arm64.so and b/lighter/signers/lighter-signer-linux-arm64.so differ
diff --git a/lighter/signers/lighter-signer-windows-amd64.dll b/lighter/signers/lighter-signer-windows-amd64.dll
index 86a83e1..c413c33 100644
Binary files a/lighter/signers/lighter-signer-windows-amd64.dll and b/lighter/signers/lighter-signer-windows-amd64.dll differ
diff --git a/lighter/signers/lighter-signer-windows-amd64.h b/lighter/signers/lighter-signer-windows-amd64.h
index 6921ded..f52a144 100644
--- a/lighter/signers/lighter-signer-windows-amd64.h
+++ b/lighter/signers/lighter-signer-windows-amd64.h
@@ -76,7 +76,7 @@ typedef struct {
 
 typedef struct {
     int16_t MarketSlot;
-    int64_t PublicMarketIndex;
+    int64_t MarketIndex;
     int64_t StartTimestampMs;
     int64_t EndTimestampMs;
     uint32_t TakerFee;
@@ -90,7 +90,7 @@ typedef struct {
 
 typedef struct {
     int16_t MarketSlot;
-    int64_t PublicMarketIndex;
+    int64_t MarketIndex;
     uint32_t SettlementPrice;
     uint8_t IsRefund;
 } BinaryOptionsOperatorSettleMarketTxReq;