diff --git a/lib/draw/BpmnRenderer.js b/lib/draw/BpmnRenderer.js
index 63cceb6d..c37a6481 100644
--- a/lib/draw/BpmnRenderer.js
+++ b/lib/draw/BpmnRenderer.js
@@ -63,17 +63,17 @@ function BpmnRenderer(events, styles, bpmnRegistry, pathMap) {
 
     addMarker('messageflow-start',
       paper
-        .circle(4, 4, 4)
+        .circle(5, 5, 5)
           .attr({
             fill: 'white',
             stroke: 'black',
             strokeWidth: 1,
             strokeDasharray: '1,0'
           })
-          .marker(0, 0, 12, 12, 6, 6)
+          .marker(0, 0, 10, 10, 5, 5)
             .attr({
-              markerWidth: 10,
-              markerHeight: 10,
+              markerWidth: 12,
+              markerHeight: 12,
               orient: 'auto',
               overflow: 'visible'
             }));
@@ -88,10 +88,10 @@ function BpmnRenderer(events, styles, bpmnRegistry, pathMap) {
             strokeLinecap: 'round',
             strokeDasharray: '1,0'
           })
-          .marker(0, 0, 12, 12, 12, 6)
+          .marker(0, 0, 10, 10, 10, 5)
             .attr({
-              markerWidth: 10,
-              markerHeight: 10,
+              markerWidth: 12,
+              markerHeight: 12,
               orient: 'auto',
               overflow: 'visible'
             }));