diff --git a/people/static/js/network.js b/people/static/js/network.js
index 90b5737..4da4d68 100644
--- a/people/static/js/network.js
+++ b/people/static/js/network.js
@@ -146,7 +146,7 @@ function get_network() {
                     lineColor: {
                         'organisation-membership': '#669933'
                     }[relationship.kind] || 'black',
-                    lineArrowShape: 'none'
+                    lineArrowShape: 'triangle'
                 }
             })
         } catch (exc) {