diff --git a/web/src/dojo/events.ts b/web/src/dojo/events.ts
index 975396382..570ba98d1 100644
--- a/web/src/dojo/events.ts
+++ b/web/src/dojo/events.ts
@@ -156,7 +156,7 @@ export const parseEvents = (
           gameId: num.toHexString(raw.data[0]),
           locationId: num.toHexString(raw.data[1]),
           drugId: num.toHexString(raw.data[2]),
-          increase: Boolean(raw.data[3]),
+          increase: raw.data[3] === "0x0" ? false : true,
         } as MarketEventData);
         break;