diff --git a/repository/Grafoscopio/GrafoscopioNotebook.class.st b/repository/Grafoscopio/GrafoscopioNotebook.class.st
index a48f5c8..478b5d1 100644
--- a/repository/Grafoscopio/GrafoscopioNotebook.class.st
+++ b/repository/Grafoscopio/GrafoscopioNotebook.class.st
@@ -556,15 +556,14 @@ GrafoscopioNotebook >> updateBodyFor: aNodeContainer [
 
 { #category : #operation }
 GrafoscopioNotebook >> updateForSpecialHeader [
-	"I see if a node header is an ulr located at 'http://ws.stfx.eu', wich means that is a shared
+	"I see if a node header is an url located at 'http://ws.stfx.eu', wich means that is a shared
 	workspace, and convert the node body to an interactive playground"
-
 	| currentNode nodeContent |
 	currentNode := tree highlightedItem.
 	currentNode ifNil: [ ^ self ].
 	nodeContent := currentNode content.
-	nodeContent header asUrl host = 'ws.stfx.eu'
-		ifFalse: [ ^ self ].
+	nodeContent header isAsciiString ifFalse: [ ^ self ].
+	nodeContent header asUrl host = 'ws.stfx.eu' ifFalse: [ ^ self ].
 	nodeContent
 		body: (ZnClient new get: nodeContent header);
 		tagAs: 'código'.