diff --git a/ClockLabel.cs b/ClockLabel.cs
index aa8c03e..5e82f20 100644
--- a/ClockLabel.cs
+++ b/ClockLabel.cs
@@ -17,9 +17,9 @@ class ClockLabel : Label
 	/**
 	 * Textformat to use.
 	 */
-	public String Format { get; set; }
+	public string Format { get; set; }
 
-	public ClockLabel(String format = "HH:mm:ss")
+	public ClockLabel(string format = "HH:mm:ss")
 	{
 		Format = format;