diff --git a/percy/TestSketchStyle.puml b/percy/TestSketchStyle.puml
index d0b85ff..8a9a6b2 100644
--- a/percy/TestSketchStyle.puml
+++ b/percy/TestSketchStyle.puml
@@ -2,7 +2,7 @@
 !if %variable_exists("RELATIVE_INCLUDE")
   !include ./../C4_Container.puml
 !else
-  !include https://raw.githubusercontent.com/plantuml-stdlib/C4-PlantUML/master//C4_Container.puml
+  !include https://raw.githubusercontent.com/plantuml-stdlib/C4-PlantUML/master/C4_Container.puml
 !endif
 
 SET_SKETCH_STYLE($bgColor="lightblue", $fontColor="darkblue", $warningColor="darkred", $footerWarning="Sketch", $footerText="Created for discussion")