diff --git a/lib/draw/BpmnRenderer.js b/lib/draw/BpmnRenderer.js
index c571448e..841af218 100644
--- a/lib/draw/BpmnRenderer.js
+++ b/lib/draw/BpmnRenderer.js
@@ -71,8 +71,8 @@ function BpmnRenderer(events, styles, bpmnRegistry, pathMap) {
           .marker(0, 0, 10, 10, 4, 4)
             .attr({
               markerUnits: 'strokeWidth',
-              markerWidth: 7,
-              markerHeight: 7,
+              markerWidth: 14,
+              markerHeight: 14,
               orient: 'auto',
               overflow: 'visible'
             }));
@@ -90,8 +90,8 @@ function BpmnRenderer(events, styles, bpmnRegistry, pathMap) {
           .marker(0, 0, 10, 10, 11, 5)
             .attr({
               markerUnits: 'strokeWidth',
-              markerWidth: 6,
-              markerHeight: 6,
+              markerWidth: 12,
+              markerHeight: 12,
               orient: 'auto',
               overflow: 'visible'
             }));
@@ -853,7 +853,8 @@ function BpmnRenderer(events, styles, bpmnRegistry, pathMap) {
       return polyline.attr({
         'marker-end': marker('messageflow-end'),
         'marker-start': marker('messageflow-start'),
-        'stroke-dasharray': '1,3'
+        'stroke-dasharray': '3',
+        'stroke-width' : 1
       });
     },
     'bpmn:DataObjectReference': function(p, data) {