diff --git a/src/lib/alarms/trade_offer.ts b/src/lib/alarms/trade_offer.ts
index 3d4b186..a2290d8 100644
--- a/src/lib/alarms/trade_offer.ts
+++ b/src/lib/alarms/trade_offer.ts
@@ -90,7 +90,7 @@ export async function pingCancelTrades(pendingTrades: Trade[]) {
         }
 
         try {
-            await PingCancelTrade.handleRequest({trade_id: trade.id}, {});
+            await PingCancelTrade.handleRequest({trade_id: trade.id, steam_id: tradeOffers.steam_id}, {});
         } catch (e) {
             console.error(`failed to send cancel ping for trade ${trade.id}`, e);
         }
@@ -238,7 +238,11 @@ async function getSentTradeOffersFromAPI(): Promise<OfferStatus[]> {
     return data.response.trade_offers_sent.map(offerStateMapper);
 }
 
-async function getSentAndReceivedTradeOffersFromAPI(): Promise<{received: OfferStatus[]; sent: OfferStatus[]}> {
+async function getSentAndReceivedTradeOffersFromAPI(): Promise<{
+    received: OfferStatus[];
+    sent: OfferStatus[];
+    steam_id?: string | null;
+}> {
     const access = await getAccessToken();
 
     const resp = await fetch(
@@ -256,6 +260,7 @@ async function getSentAndReceivedTradeOffersFromAPI(): Promise<{received: OfferS
     return {
         received: data.response.trade_offers_received.map(offerStateMapper),
         sent: data.response.trade_offers_sent.map(offerStateMapper),
+        steam_id: access.steam_id,
     };
 }
 
diff --git a/src/lib/bridge/handlers/ping_cancel_trade.ts b/src/lib/bridge/handlers/ping_cancel_trade.ts
index a319ebe..eacfbf9 100644
--- a/src/lib/bridge/handlers/ping_cancel_trade.ts
+++ b/src/lib/bridge/handlers/ping_cancel_trade.ts
@@ -5,6 +5,7 @@ import {Trade} from '../../types/float_market';
 
 export interface PingCancelTradeRequest {
     trade_id: string;
+    steam_id?: string | null;
 }
 
 export interface PingCancelTradeResponse {
@@ -17,6 +18,12 @@ export const PingCancelTrade = new SimpleHandler<PingCancelTradeRequest, PingCan
         const resp = await fetch(`${environment.csfloat_base_api_url}/v1/trades/${req.trade_id}/cancel-ping`, {
             credentials: 'include',
             method: 'POST',
+            headers: {
+                'Content-Type': 'application/json',
+            },
+            body: JSON.stringify({
+                steam_id: req.steam_id,
+            }),
         });
 
         if (resp.status !== 200) {