diff --git a/web/src/components/graph/SystemGraph.tsx b/web/src/components/graph/SystemGraph.tsx
index f64d94ad2..098a1957e 100644
--- a/web/src/components/graph/SystemGraph.tsx
+++ b/web/src/components/graph/SystemGraph.tsx
@@ -37,6 +37,7 @@ export function ThresholdBarGraph({
       return undefined;
     }
 
+    // @ts-expect-error y is valid
     const yValues: number[] = data[0].data.map((point) => point?.y);
     return Math.max(threshold.warning, ...yValues);
   }, [data, threshold, unit]);