diff --git a/src/render/font-metrics.ts b/src/render/font-metrics.ts
index 3355ed1..f40555c 100644
--- a/src/render/font-metrics.ts
+++ b/src/render/font-metrics.ts
@@ -27,6 +27,7 @@ export class FontMetrics {
         container.style.fontSize = fontSize;
         container.style.margin = '0';
         container.style.padding = '0';
+        container.style.whiteSpace = 'nowrap';
 
         body.appendChild(container);