diff --git a/examples/sum.l b/examples/sum.l
deleted file mode 100644
--- a/examples/sum.l
+++ /dev/null
@@ -1,5 +0,0 @@
-let
-	sum list = case list of
-		Nil -> 0
-		Cons z zs -> (\x.λy -> + x y) z (sum zs)
-in sum (Cons 1 (Cons 2 Nil))
diff --git a/graph-rewriting-ww.cabal b/graph-rewriting-ww.cabal
--- a/graph-rewriting-ww.cabal
+++ b/graph-rewriting-ww.cabal
@@ -1,5 +1,5 @@
 Name:           graph-rewriting-ww
-Version:        0.3.5
+Version:        0.3.6
 Copyright:      (c) 2010, Jan Rochel
 License:        BSD3
 License-File:   LICENSE
@@ -16,15 +16,15 @@
 Executable ww
   Main-Is:        Main.hs
   Build-Depends:
-    base >= 4 && < 4.9,
-    base-unicode-symbols >= 0.2 && < 0.3,
-    graph-rewriting >= 0.7.8 && < 0.8,
-    graph-rewriting-layout >= 0.5.4 && < 0.6,
-    graph-rewriting-gl >= 0.7.6 && < 0.8,
-    parsec >= 3.1 && < 3.2,
-    GLUT >= 2.2 && < 2.8,
-    OpenGL == 3.*,
-    IndentParser >= 0.2 && < 0.3
+    base >= 4 && < 5,
+    base-unicode-symbols >= 0.2,
+    graph-rewriting >= 0.7.8,
+    graph-rewriting-layout >= 0.5.4,
+    graph-rewriting-gl >= 0.7.6,
+    parsec >= 3.1,
+    GLUT >= 2.2,
+    OpenGL >= 3.0,
+    IndentParser >= 0.2
   Extensions:
     UnicodeSyntax
     FlexibleInstances