diff --git a/api/_constants.ts b/api/_constants.ts
index ee5cc58a5..8f1b20d4d 100644
--- a/api/_constants.ts
+++ b/api/_constants.ts
@@ -202,3 +202,5 @@ export const DOMAIN_CALLDATA_DELIMITER = "0x1dc0de";
 export const DEFAULT_LITE_CHAIN_USD_MAX_BALANCE = "250000";
 
 export const DEFAULT_LITE_CHAIN_USD_MAX_DEPOSIT = "25000";
+
+export const DEFAULT_FILL_DEADLINE_BUFFER_SECONDS = 2.5 * 60 * 60; // 2.5 hours
diff --git a/api/_fill-deadline.ts b/api/_fill-deadline.ts
new file mode 100644
index 000000000..2016e28b4
--- /dev/null
+++ b/api/_fill-deadline.ts
@@ -0,0 +1,19 @@
+import { DEFAULT_FILL_DEADLINE_BUFFER_SECONDS } from "./_constants";
+import { getSpokePool } from "./_utils";
+
+function getFillDeadlineBuffer(chainId: number) {
+  const bufferFromEnv = (
+    JSON.parse(process.env.FILL_DEADLINE_BUFFER_SECONDS || "{}") as Record<
+      string,
+      string
+    >
+  )?.[chainId.toString()];
+  return Number(bufferFromEnv ?? DEFAULT_FILL_DEADLINE_BUFFER_SECONDS);
+}
+
+export async function getFillDeadline(chainId: number): Promise<number> {
+  const fillDeadlineBuffer = getFillDeadlineBuffer(chainId);
+  const spokePool = getSpokePool(chainId);
+  const currentTime = await spokePool.callStatic.getCurrentTime();
+  return Number(currentTime) + fillDeadlineBuffer;
+}
diff --git a/api/_utils.ts b/api/_utils.ts
index 69851b2de..4b94d2296 100644
--- a/api/_utils.ts
+++ b/api/_utils.ts
@@ -85,7 +85,6 @@ const {
   REACT_APP_HUBPOOL_CHAINID,
   REACT_APP_PUBLIC_INFURA_ID,
   REACT_APP_COINGECKO_PRO_API_KEY,
-  GAS_MARKUP, // To be deprecated and replaced by BASE_FEE_MARKUP and PRIORITY_FEE_MARKUP
   BASE_FEE_MARKUP,
   PRIORITY_FEE_MARKUP,
   VERCEL_ENV,
@@ -94,7 +93,7 @@ const {
 
 export const baseFeeMarkup: {
   [chainId: string]: number;
-} = JSON.parse(BASE_FEE_MARKUP || GAS_MARKUP || "{}");
+} = JSON.parse(BASE_FEE_MARKUP || "{}");
 export const priorityFeeMarkup: {
   [chainId: string]: number;
 } = JSON.parse(PRIORITY_FEE_MARKUP || "{}");
diff --git a/api/suggested-fees.ts b/api/suggested-fees.ts
index a1ad89a28..35a9ebdf4 100644
--- a/api/suggested-fees.ts
+++ b/api/suggested-fees.ts
@@ -39,6 +39,7 @@ import {
   AmountTooHighError,
   AmountTooLowError,
 } from "./_errors";
+import { getFillDeadline } from "./_fill-deadline";
 
 const { BigNumber } = ethers;
 
@@ -187,6 +188,7 @@ const handler = async (
       [currentUt, nextUt, _quoteTimestamp, rawL1TokenConfig],
       tokenPriceUsd,
       limits,
+      fillDeadline,
     ] = await Promise.all([
       callViaMulticall3(provider, multiCalls, { blockTag: quoteBlockNumber }),
       getCachedTokenPrice(l1Token.address, "usd"),
@@ -203,6 +205,7 @@ const handler = async (
         depositWithMessage ? relayer : undefined,
         depositWithMessage ? message : undefined
       ),
+      getFillDeadline(destinationChainId),
     ]);
     const { maxDeposit, maxDepositInstant, minDeposit, relayerFeeDetails } =
       limits;
@@ -341,6 +344,7 @@ const handler = async (
         maxDepositShortDelay: limits.maxDepositShortDelay,
         recommendedDepositInstant: limits.recommendedDepositInstant,
       },
+      fillDeadline: fillDeadline.toString(),
     };
 
     logger.debug({
diff --git a/package.json b/package.json
index 67a167b89..6ec93dc78 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
     "@across-protocol/constants": "^3.1.24",
     "@across-protocol/contracts": "^3.0.19",
     "@across-protocol/contracts-v3.0.6": "npm:@across-protocol/contracts@3.0.6",
-    "@across-protocol/sdk": "^3.4.5",
+    "@across-protocol/sdk": "^3.4.7",
     "@amplitude/analytics-browser": "^2.3.5",
     "@balancer-labs/sdk": "1.1.6-beta.16",
     "@emotion/react": "^11.13.0",
diff --git a/src/utils/bridge.ts b/src/utils/bridge.ts
index c2b5acd7b..d60e15127 100644
--- a/src/utils/bridge.ts
+++ b/src/utils/bridge.ts
@@ -1,7 +1,6 @@
 import { ethers, BigNumber } from "ethers";
 import {
   ChainId,
-  DEFAULT_FILL_DEADLINE_BUFFER_SECONDS,
   fixedPointAdjustment,
   referrerDelimiterHex,
 } from "./constants";
@@ -32,6 +31,7 @@ export type BridgeFees = {
   estimatedFillTimeSec: number;
   exclusiveRelayer: string;
   exclusivityDeadline: number;
+  fillDeadline: number;
 };
 
 type GetBridgeFeesArgs = {
@@ -77,6 +77,7 @@ export async function getBridgeFees({
     estimatedFillTimeSec,
     exclusiveRelayer,
     exclusivityDeadline,
+    fillDeadline,
   } = await getApiEndpoint().suggestedFees(
     amount,
     getConfig().getTokenInfoBySymbol(fromChainId, inputTokenSymbol).address,
@@ -103,6 +104,7 @@ export async function getBridgeFees({
     estimatedFillTimeSec,
     exclusiveRelayer,
     exclusivityDeadline,
+    fillDeadline,
   };
 }
 
@@ -150,7 +152,7 @@ export type AcrossDepositArgs = {
 export type AcrossDepositV3Args = AcrossDepositArgs & {
   inputTokenAddress: string;
   outputTokenAddress: string;
-  fillDeadline?: number;
+  fillDeadline: number;
   exclusivityDeadline?: number;
   exclusiveRelayer?: string;
 };
@@ -236,7 +238,6 @@ export async function sendDepositV3Tx(
   const outputAmount = inputAmount.sub(
     inputAmount.mul(relayerFeePct).div(fixedPointAdjustment)
   );
-  fillDeadline ??= await getFillDeadline(spokePool);
 
   const useExclusiveRelayer =
     exclusiveRelayer !== ethers.constants.AddressZero &&
@@ -350,7 +351,6 @@ export async function sendSwapAndBridgeTx(
   const outputAmount = inputAmount.sub(
     inputAmount.mul(relayerFeePct).div(fixedPointAdjustment)
   );
-  fillDeadline ??= await getFillDeadline(spokePool);
 
   const tx = await swapAndBridge.populateTransaction.swapAndBridge(
     swapQuote.routerCalldata,
@@ -424,15 +424,6 @@ export async function getSpokePoolAndVerifier({
   };
 }
 
-async function getFillDeadline(spokePool: SpokePool): Promise<number> {
-  const fillDeadlineBuffer = Number(
-    process.env.FILL_DEADLINE_BUFFER_SECONDS ??
-      DEFAULT_FILL_DEADLINE_BUFFER_SECONDS
-  );
-  const currentTime = await spokePool.callStatic.getCurrentTime();
-  return Number(currentTime) + fillDeadlineBuffer;
-}
-
 async function _tagRefAndSignTx(
   tx: ethers.PopulatedTransaction,
   referrer: string,
diff --git a/src/utils/constants.ts b/src/utils/constants.ts
index 76d61c00d..49508b541 100644
--- a/src/utils/constants.ts
+++ b/src/utils/constants.ts
@@ -551,5 +551,3 @@ export const defaultSwapSlippage = Number(
 
 export const indexerApiBaseUrl =
   process.env.REACT_APP_INDEXER_BASE_URL || undefined;
-
-export const DEFAULT_FILL_DEADLINE_BUFFER_SECONDS = 2.5 * 60 * 60; // 2.5 hours
diff --git a/src/utils/serverless-api/mocked/suggested-fees.mocked.ts b/src/utils/serverless-api/mocked/suggested-fees.mocked.ts
index 4477ebf10..b02d76bfe 100644
--- a/src/utils/serverless-api/mocked/suggested-fees.mocked.ts
+++ b/src/utils/serverless-api/mocked/suggested-fees.mocked.ts
@@ -51,5 +51,6 @@ export async function suggestedFeesMockedApiCall(
     },
     exclusiveRelayer: ethers.constants.AddressZero,
     exclusivityDeadline: 0,
+    fillDeadline: Date.now(),
   };
 }
diff --git a/src/utils/serverless-api/prod/suggested-fees.prod.ts b/src/utils/serverless-api/prod/suggested-fees.prod.ts
index 7481cee24..3e5ea2bf5 100644
--- a/src/utils/serverless-api/prod/suggested-fees.prod.ts
+++ b/src/utils/serverless-api/prod/suggested-fees.prod.ts
@@ -89,5 +89,6 @@ export async function suggestedFeesApiCall(
     estimatedFillTimeSec,
     exclusiveRelayer,
     exclusivityDeadline,
+    fillDeadline: result.fillDeadline,
   };
 }
diff --git a/src/utils/serverless-api/types.ts b/src/utils/serverless-api/types.ts
index 488b9afab..c85d4b2d5 100644
--- a/src/utils/serverless-api/types.ts
+++ b/src/utils/serverless-api/types.ts
@@ -58,6 +58,7 @@ export type SuggestedApiFeeReturnType = {
   estimatedFillTimeSec: number;
   exclusiveRelayer: string;
   exclusivityDeadline: number;
+  fillDeadline: number;
 };
 
 export type SuggestedApiFeeType = (
diff --git a/src/views/Bridge/hooks/useBridgeAction.ts b/src/views/Bridge/hooks/useBridgeAction.ts
index 891363bc8..a47b3eb8a 100644
--- a/src/views/Bridge/hooks/useBridgeAction.ts
+++ b/src/views/Bridge/hooks/useBridgeAction.ts
@@ -238,6 +238,7 @@ export function useBridgeAction(
             // Disabling until we update the contract.
             exclusiveRelayer: constants.AddressZero,
             exclusivityDeadline: 0,
+            fillDeadline: frozenFeeQuote.fillDeadline,
           },
           networkMismatchHandler
         );
@@ -266,6 +267,7 @@ export function useBridgeAction(
                   toAddress: externalProjectIsHyperLiquid
                     ? "0x924a9f036260DdD5808007E1AA95f08eD08aA569" // Default multicall handler
                     : frozenDepositArgs.toAddress,
+                  fillDeadline: frozenFeeQuote.fillDeadline,
                 },
                 spokePool,
                 networkMismatchHandler
diff --git a/yarn.lock b/yarn.lock
index 1b7066726..9b06bf5bf 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -21,11 +21,6 @@
   resolved "https://registry.yarnpkg.com/@across-protocol/constants/-/constants-3.1.25.tgz#60d6d9814582ff91faf2b6d9f51d6dccb447b4ce"
   integrity sha512-GpZoYn7hETYL2BPMM2GqXAer6+l/xuhder+pvpb00HJcb/sqCjF7vaaeKxjKJ3jKtyeulYmdu0NDkeNm5KbNWA==
 
-"@across-protocol/constants@^3.1.25":
-  version "3.1.25"
-  resolved "https://registry.yarnpkg.com/@across-protocol/constants/-/constants-3.1.25.tgz#60d6d9814582ff91faf2b6d9f51d6dccb447b4ce"
-  integrity sha512-GpZoYn7hETYL2BPMM2GqXAer6+l/xuhder+pvpb00HJcb/sqCjF7vaaeKxjKJ3jKtyeulYmdu0NDkeNm5KbNWA==
-
 "@across-protocol/constants@^3.1.9":
   version "3.1.13"
   resolved "https://registry.yarnpkg.com/@across-protocol/constants/-/constants-3.1.13.tgz#b4caf494e9d9fe50290cca91b7883ea408fdb90a"
@@ -88,10 +83,10 @@
     yargs "^17.7.2"
     zksync-web3 "^0.14.3"
 
-"@across-protocol/sdk@^3.4.5":
-  version "3.4.5"
-  resolved "https://registry.yarnpkg.com/@across-protocol/sdk/-/sdk-3.4.5.tgz#343f53be92e92afd2fd4dbea16f180533093ea26"
-  integrity sha512-o1DovRfSriL0GTa304rd2KcBDwWYbK2SHT8mElyCLg6beX5RnJKT0YiMUMuCMfZ7MZJscdGzV023e5BhbyeP5A==
+"@across-protocol/sdk@^3.4.7":
+  version "3.4.7"
+  resolved "https://registry.yarnpkg.com/@across-protocol/sdk/-/sdk-3.4.7.tgz#6ddf9698f918d7b7e0216327d60b54b37fe14f22"
+  integrity sha512-GeyzDG8EzlN8oddmjXASqND+usZPkWDLpzbdWfAfBfHT3pjIMatntZqZghfCfjy+ICf+rlYrAb8I24H4jlct8Q==
   dependencies:
     "@across-protocol/across-token" "^1.0.0"
     "@across-protocol/constants" "^3.1.25"