diff --git a/templates/base/head.tmpl b/templates/base/head.tmpl
index a0710a77bc..61e8f39ac9 100644
--- a/templates/base/head.tmpl
+++ b/templates/base/head.tmpl
@@ -78,12 +78,16 @@
 				EventSourceUpdateTime: {{NotificationSettings.EventSourceUpdateTime}},
 			},
       {{if .RequireTribute}}
-			tributeValues: [
-				{{ range .Assignees }}
-				{key: '{{.Name}} {{.FullName}}', value: '{{.Name}}',
-				name: '{{.Name}}', fullname: '{{.FullName}}', avatar: '{{.RelAvatarLink}}'},
+			tributeValues: Array.from(new Map([
+				{{ range .Participants }}
+				['{{.Name}}', {key: '{{.Name}} {{.FullName}}', value: '{{.Name}}',
+				name: '{{.Name}}', fullname: '{{.FullName}}', avatar: '{{.RelAvatarLink}}'}],
 				{{ end }}
-			],
+				{{ range .Assignees }}
+				['{{.Name}}', {key: '{{.Name}} {{.FullName}}', value: '{{.Name}}',
+				name: '{{.Name}}', fullname: '{{.FullName}}', avatar: '{{.RelAvatarLink}}'}],
+				{{ end }}
+			]).values()),
 			{{end}}
 		};
 	</script>