diff --git a/src/predictor.ts b/src/predictor.ts
index 6e28072..9d19be5 100644
--- a/src/predictor.ts
+++ b/src/predictor.ts
@@ -47,6 +47,7 @@ export function MakePrediction(election : Election, overlay_image?: string, over
 			const url = await fetch(overlay_image);
             const arrayBuffer = await url.arrayBuffer();
             const overlayBuffer = Buffer.from(arrayBuffer);
+            const { width, height } = await sharp(png).metadata();
 
             const overlay = await sharp(overlayBuffer)
                 .composite([{
@@ -59,6 +60,7 @@ export function MakePrediction(election : Election, overlay_image?: string, over
                     tile: true,
                     blend: 'dest-in',
                 }])
+                .resize(width, height)
                 .png()
                 .toBuffer();