--- a/java/sql-dk/src/info/globalcode/sql/dk/SQLCommandNumbered.java	Tue Jan 07 21:54:59 2014 +0100
+++ b/java/sql-dk/src/info/globalcode/sql/dk/SQLCommandNumbered.java	Wed Jan 08 12:44:18 2014 +0100
@@ -28,9 +28,9 @@
  */
 public class SQLCommandNumbered extends SQLCommand {
 
-	private List<Parameter> parameters;
+	private List<? extends Parameter> parameters;
 
-	public SQLCommandNumbered(String query, List<Parameter> parameters) {
+	public SQLCommandNumbered(String query, List<? extends Parameter> parameters) {
 		super(query);
 		this.parameters = parameters;
 	}
@@ -44,7 +44,7 @@
 	}
 
 	@Override
-	public List<Parameter> getParameters() {
+	public List<? extends Parameter> getParameters() {
 		return parameters;
 	}
 }