diff --git a/source/app.d b/source/app.d
index 5ca254c..48d7166 100644
--- a/source/app.d
+++ b/source/app.d
@@ -149,7 +149,8 @@ void Open(string file, ref TreeView tree, Object header){
 
 	//Set store types
 	GType type[];
-	foreach(i;0..twoda.header.length)type~=GType.STRING;
+	type~=GType.INT;
+	foreach(i;1..twoda.header.length)type~=GType.STRING;
 
 	//Create new store
 	auto store = new ListStore(type);
@@ -159,23 +160,31 @@ void Open(string file, ref TreeView tree, Object header){
 	//Setup TreeView columns
 	foreach(index, s ; twoda.header){
 
-		CellRendererText cr;
+		CellRendererText cr = new CellRendererText();
+		cr.setProperty("editable", true);
 		if(index==0){
-			cr = new CellRendererText();
-			cr.setProperty("editable", false);
 			cr.setProperty("background-rgba", cast(ulong)(new GdkRGBA(0.36, 0.13, 0.4, 1.0)));
 			cr.setProperty("background-set", true);
-		}	
+
+			cr.addOnEdited((string path, string newval, CellRendererText crt){
+				try{
+					int n = newval.to!int;
+					TreeIter t = new TreeIter(tree.getModel(), path);
+					store.setValue(t, cast(int)crt.getData("colnumber"), n);
+				}
+				catch(Exception e){
+					writeln("Not a number");
+				}
+
+			});
+		}
 		else{
-			cr = new CellRendererText();
-
-			cr.setProperty("editable", true);
-
 			cr.addOnEdited((string path, string newval, CellRendererText crt){
 				TreeIter t = new TreeIter(tree.getModel(), path);
 				store.setValue(t, cast(int)crt.getData("colnumber"), newval);
 			});
 		}
+
 		cr.setData("colnumber", cast(void*)cast(int)index);