diff --git a/src/public/app/components/zoom.js b/src/public/app/components/zoom.js
index 4a0816aae..4a028a862 100644
--- a/src/public/app/components/zoom.js
+++ b/src/public/app/components/zoom.js
@@ -16,7 +16,7 @@ class ZoomComponent extends Component {
 
             window.addEventListener("wheel", event => {
                 if (event.ctrlKey) {
-                    this.setZoomFactorAndSave(this.getCurrentZoom() + event.deltaY * 0.001);
+                    this.setZoomFactorAndSave(this.getCurrentZoom() - event.deltaY * 0.001);
                 }
             });
         }
@@ -56,7 +56,7 @@ class ZoomComponent extends Component {
     zoomResetEvent() {
         this.setZoomFactorAndSave(1);
     }
-    
+
     setZoomFactorAndSaveEvent({zoomFactor}) {
         this.setZoomFactorAndSave(zoomFactor);
     }