diff --git a/state_machine_exporter/src/main/java/click/kamil/springstatemachineexporter/exporter/PlantUml.java b/state_machine_exporter/src/main/java/click/kamil/springstatemachineexporter/exporter/PlantUml.java
index 9beade8..90ddf93 100644
--- a/state_machine_exporter/src/main/java/click/kamil/springstatemachineexporter/exporter/PlantUml.java
+++ b/state_machine_exporter/src/main/java/click/kamil/springstatemachineexporter/exporter/PlantUml.java
@@ -126,7 +126,7 @@ public class PlantUml implements StateMachineExporter {
                         if (!label.isEmpty()) {
                             sb.append(label);
                         } else {
-                            sb.append("<U+00A0>");
+                            sb.append("<color:transparent>.</color>");
                         }
                         sb.append("]]");
                     } else if (!label.isEmpty()) {