diff --git a/extensions/fablabchemnitz_viewbox.inx b/extensions/fablabchemnitz_viewbox.inx
index 5aef8929..acdc2022 100644
--- a/extensions/fablabchemnitz_viewbox.inx
+++ b/extensions/fablabchemnitz_viewbox.inx
@@ -1,16 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
-<name>Set View Box</name>
-<id>fablabchemnitz.de.setviewbox</id>
-<effect>
-	<object-type>rect</object-type>
-	<effects-menu>
-         <submenu name="FabLab Chemnitz">
-            <submenu name="Various"/>
-         </submenu>
-	</effects-menu>
-</effect>
-<script>
-	<command location="inx" interpreter="python">fablabchemnitz_viewbox.py</command>
-</script>
+	<name>Set View Box</name>
+	<id>fablabchemnitz.de.setviewbox</id>
+	<effect>
+		<object-type>rect</object-type>
+		<effects-menu>
+			<submenu name="FabLab Chemnitz">
+				<submenu name="Legacy Tools"/>
+			</submenu>
+		</effects-menu>
+	</effect>
+	<script>
+		<command location="inx" interpreter="python">fablabchemnitz_viewbox.py</command>
+	</script>
 </inkscape-extension>
\ No newline at end of file
diff --git a/extensions/fablabchemnitz_viewbox.py b/extensions/fablabchemnitz_viewbox.py
index 5daec636..5cafab09 100644
--- a/extensions/fablabchemnitz_viewbox.py
+++ b/extensions/fablabchemnitz_viewbox.py
@@ -34,7 +34,7 @@ class SetViewBoxEffect(inkex.Effect):
     def effect(self):
         if len(self.svg.selected) != 1:
             sys.exit("Error: You must select exactly one rectangle")
-        elif self.svg.selected[0].tag != inkex.addNS('rect','svg'):
+        if list(self.svg.selected.items())[0][1].tag != inkex.addNS('rect','svg'):
             sys.exit("Error: You must select exactly one rectangle")
             
         sel = None
@@ -67,4 +67,4 @@ def transformPoint(mat, pt):
     Transform(mat).apply_to_point(pt2)
     return (pt2[0], pt2[1])
 
-SetViewBoxEffect().run()
\ No newline at end of file
+SetViewBoxEffect().run()