diff --git a/site/src/components/MmpChart.svelte b/site/src/components/MmpChart.svelte
index 4a9efcb..cf7b3b4 100644
--- a/site/src/components/MmpChart.svelte
+++ b/site/src/components/MmpChart.svelte
@@ -101,10 +101,12 @@
         label: 'Duration',
         tickFormat: (d: number) => formatDuration(d),
         grid: true,
+        domain: [data[0]?.d ?? 1, Math.max(7200, ...data.map(d => d.d))],
       },
       y: {
         label: 'Avg power (W)',
         grid: true,
+        domain: [0, null],
       },
       color: {
         domain: selectedKeys,