diff --git a/src/FPPrac/Trees.hs b/src/FPPrac/Trees.hs
--- a/src/FPPrac/Trees.hs
+++ b/src/FPPrac/Trees.hs
@@ -1,7 +1,7 @@
 module FPPrac.Trees 
-    ( RoseTree
-    , RBTree
-    , NodeColor
+    ( RoseTree(..)
+    , RBTree(..)
+    , NodeColor(..)
     , rbExampleTree
     , roseExampleTree
     , showRBTree
diff --git a/twentefp-eventloop-trees.cabal b/twentefp-eventloop-trees.cabal
--- a/twentefp-eventloop-trees.cabal
+++ b/twentefp-eventloop-trees.cabal
@@ -1,5 +1,5 @@
 name:                twentefp-eventloop-trees
-version:             0.1.0.0
+version:             0.1.0.1
 synopsis:            Tree type and show functions for lab assignment of University of Twente. Contains RoseTree and RedBlackTree
 license:             BSD3
 license-file:        LICENSE