diff --git a/src/CreateGraphPath.ts b/src/CreateGraphPath.ts
index 67e9a2e..260a9ec 100644
--- a/src/CreateGraphPath.ts
+++ b/src/CreateGraphPath.ts
@@ -101,6 +101,8 @@ export const getYPositionInRange = (
   value: number,
   yRange: GraphYRange
 ): number => {
+  if (yRange.min === yRange.max) return 0.5 // Prevent division by zero (NaN)
+
   const diff = yRange.max - yRange.min
   const y = value