diff --git a/problems/traffic-signal.md b/problems/traffic-signal.md
index 99371ebe..76490092 100644
--- a/problems/traffic-signal.md
+++ b/problems/traffic-signal.md
@@ -10,7 +10,7 @@
 
 ## UML Class Diagram
 
-![](../class-diagrams/trafficsignalsystem-class-diagram.png)
+![](../class-diagrams/trafficcontrolsystem-class-diagram.png)
 
 ## Implementations
 #### [Java Implementation](../solutions/java/src/trafficsignalcontrolsystem/)