diff --git a/sdks/uniswapx-sdk/src/order/V3DutchOrder.ts b/sdks/uniswapx-sdk/src/order/V3DutchOrder.ts
index 606e41b47..eac2da40e 100644
--- a/sdks/uniswapx-sdk/src/order/V3DutchOrder.ts
+++ b/sdks/uniswapx-sdk/src/order/V3DutchOrder.ts
@@ -317,7 +317,9 @@ export class UnsignedV3DutchOrder implements OffChainOrder {
                 startAmount: this.info.input.startAmount,
                 curve: {
                     relativeBlocks: encodeRelativeBlocks(this.info.input.curve.relativeBlocks),
-                    relativeAmounts: this.info.input.curve.relativeAmounts,
+                    relativeAmounts: this.info.input.curve.relativeAmounts.map((amount) =>
+                        amount.toString()
+                    ),
                 },
                 maxAmount: this.info.input.maxAmount,
                 adjustmentPerGweiBaseFee: this.info.input.adjustmentPerGweiBaseFee,
@@ -327,7 +329,9 @@ export class UnsignedV3DutchOrder implements OffChainOrder {
                 startAmount: output.startAmount,
                 curve: {
                     relativeBlocks: encodeRelativeBlocks(output.curve.relativeBlocks),
-                    relativeAmounts: output.curve.relativeAmounts,
+                    relativeAmounts: output.curve.relativeAmounts.map((amount) =>
+                        amount.toString()
+                    ),
                 },
                 recipient: output.recipient,
                 minAmount: output.minAmount,
diff --git a/sdks/uniswapx-sdk/src/order/types.ts b/sdks/uniswapx-sdk/src/order/types.ts
index 160f7861a..d85347010 100644
--- a/sdks/uniswapx-sdk/src/order/types.ts
+++ b/sdks/uniswapx-sdk/src/order/types.ts
@@ -37,7 +37,7 @@ export interface OffChainOrder {
    * Returns any block overrides to be applied when quoting the order on chain
    * @return The block overrides
    */
-  get blockOverrides(): BlockOverrides
+  get blockOverrides(): BlockOverrides;
 }
 
 export type TokenAmount = {
@@ -73,7 +73,7 @@ export type PriorityOrderResolutionOptions = {
 export type V3OrderResolutionOptions = {
   currentBlock: number;
   filler?: string;
-}
+};
 
 export type DutchOutput = {
   readonly token: string;
@@ -146,7 +146,10 @@ export type V3DutchInput = {
   readonly adjustmentPerGweiBaseFee: BigNumber;
 };
 
-export type V3DutchInputJSON = Omit<V3DutchInput, "startAmount" | "curve" | "maxAmount" | "adjustmentPerGweiBaseFee"> & {
+export type V3DutchInputJSON = Omit<
+  V3DutchInput,
+  "startAmount" | "curve" | "maxAmount" | "adjustmentPerGweiBaseFee"
+> & {
   startAmount: string;
   curve: NonlinearDutchDecayJSON;
   maxAmount: string;
@@ -160,7 +163,7 @@ export type NonlinearDutchDecay = {
 
 export type EncodedNonlinearDutchDecay = {
   relativeBlocks: BigNumber;
-  relativeAmounts: bigint[];
+  relativeAmounts: string[];
 };
 
 export type EncodedV3DutchInput = Omit<V3DutchInput, "curve"> & {
@@ -185,9 +188,12 @@ export type V3DutchOutput = {
   readonly adjustmentPerGweiBaseFee: BigNumber;
 };
 
-export type V3DutchOutputJSON = Omit<V3DutchOutput, "startAmount" | "curve" | "minAmount" | "adjustmentPerGweiBaseFee"> & {
+export type V3DutchOutputJSON = Omit<
+  V3DutchOutput,
+  "startAmount" | "curve" | "minAmount" | "adjustmentPerGweiBaseFee"
+> & {
   startAmount: string;
   curve: NonlinearDutchDecayJSON;
   minAmount: string;
   adjustmentPerGweiBaseFee: string;
-};
\ No newline at end of file
+};