diff --git a/lib/SvelteUi/app/src/lib/VoltPlot.svelte b/lib/SvelteUi/app/src/lib/VoltPlot.svelte
index c11991d9..88d422b6 100644
--- a/lib/SvelteUi/app/src/lib/VoltPlot.svelte
+++ b/lib/SvelteUi/app/src/lib/VoltPlot.svelte
@@ -42,7 +42,7 @@
                 max: 260,
                 ticks: [
                     { value: 207, label: '-10%' },
-                    { value: 230, label: '230v' },
+                    { value: 230, label: '230V' },
                     { value: 253, label: '+10%' }
                 ]
             },