diff --git a/frontend/src/components/files/ExtendedImage.vue b/frontend/src/components/files/ExtendedImage.vue
index b0be0149..742523a6 100644
--- a/frontend/src/components/files/ExtendedImage.vue
+++ b/frontend/src/components/files/ExtendedImage.vue
@@ -260,7 +260,7 @@ export default {
       }
     },
     wheelMove(event) {
-      this.scale += (event.wheelDeltaY / 100) * this.zoomStep;
+      this.scale += -Math.sign(event.deltaY) * this.zoomStep;
       this.setZoom();
     },
     setZoom() {