diff --git a/package.json b/package.json
index c07f652..b799569 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@0xsquid/squid-types",
-  "version": "0.1.77",
+  "version": "0.1.78",
   "description": "JS and TS types relating to 0xsquid related projects.",
   "main": "dist/index.js",
   "types": "./dist/index.d.ts",
diff --git a/src/routes/index.ts b/src/routes/index.ts
index 3a25414..282db48 100644
--- a/src/routes/index.ts
+++ b/src/routes/index.ts
@@ -23,7 +23,7 @@ export interface RouteRequest {
   toChain: string;
   toToken: string;
   toAddress?: string;
-  slippage: number;
+  slippage?: number;
   quoteOnly?: boolean;
   enableBoost?: boolean;
   preHook?: Hook;