diff --git a/src/api-wrapper.ts b/src/api-wrapper.ts
index fba756f..6a28789 100644
--- a/src/api-wrapper.ts
+++ b/src/api-wrapper.ts
@@ -69,29 +69,29 @@ export const mapping = async (options: { useragent: string }): Promise<Types.Ful
  * @param interval - (optional) Either "5m" or "60m". Defaults to "5m".
  * @param useragent - (required) a User-Agent that describes what you're using it for,
  * and if you're willing, some sort of contact info (like an email or Discord).
- * @param timestamp - (optional) Timestep to return prices for.
+ * @param timestep - (optional) timestep to return prices for.
  * If provided, will display 5-minute averages for all items we have data on for this time.
  * The timestamp field represents the beginning of the 5-minute period being averaged
  * @returns An associative array object.
  * @see https://oldschool.runescape.wiki/w/RuneScape:Real-time_Prices
  */
 export const prices = async (options: {
-  interval?: "5m" | "1h";
+  timestep?: "5m" | "1h";
   timestamp?: number | string;
   useragent: string;
 }): Promise<Types.TimeSeriesData> => {
   const { timestamp, useragent } = options || {};
-  let { interval } = options || {};
+  let { timestep } = options || {};
   if (!useragent) throw new Error("useragent is required");
-  if (interval) interval.toLowerCase();
+  if (timestep) timestep.toLowerCase();
 
-  if (interval !== "5m" && interval !== "1h")
+  if (timestep !== "5m" && timestep !== "1h")
     console.error("interval must be '5m' or '1h'. Falling back to 5min, in future, this will be an error.");
-  interval = interval ?? "5m";
+  timestep = timestep ?? "5m";
 
   const url = timestamp
-    ? `https://prices.runescape.wiki/api/v1/osrs/${interval}?timestamp=${timestamp}`
-    : `https://prices.runescape.wiki/api/v1/osrs/${interval}`;
+    ? `https://prices.runescape.wiki/api/v1/osrs/${timestep}?timestamp=${timestamp}`
+    : `https://prices.runescape.wiki/api/v1/osrs/${timestep}`;
 
   const response = (
     await axios.get<{ data: any } & { timestamp: number }>(url, {
diff --git a/tests/api.test.ts b/tests/api.test.ts
index d26ae7d..a6c2d46 100644
--- a/tests/api.test.ts
+++ b/tests/api.test.ts
@@ -33,14 +33,14 @@ describe("/mapping endpoint", () => {
 
 describe("prices /5m endpoint", () => {
   it("resolves the 5min data", async () => {
-    const minData = await API.prices({ useragent, interval: "5m" });
+    const minData = await API.prices({ useragent, timestep: "5m" });
     chai.expect(minData).to.have.property("4151");
   });
 });
 
 describe("prices /1h endpoint", () => {
   it("resolves the 1hour data", async () => {
-    const minData = await API.prices({ useragent, interval: "1h" });
+    const minData = await API.prices({ useragent, timestep: "1h" });
     chai.expect(minData).to.have.property("4151");
   });
 });