diff --git a/Makefile b/Makefile
--- a/Makefile
+++ b/Makefile
@@ -5,4 +5,4 @@
 	runhaskell Setup test comfort-graph-test --show-details=streaming
 
 update-test:
-	doctest-extract -i src/ -o test/ --executable-main=Main.hs Data.Graph.Comfort
+	doctest-extract-0.1 -i src/ -o test/ --executable-main=Main.hs Data.Graph.Comfort
diff --git a/comfort-graph.cabal b/comfort-graph.cabal
--- a/comfort-graph.cabal
+++ b/comfort-graph.cabal
@@ -1,5 +1,5 @@
 Name:                comfort-graph
-Version:             0.0.3.2
+Version:             0.0.3.3
 Synopsis:            Graph structure with type parameters for nodes and edges
 Description:
   This graph structure is based on "Data.Map"
@@ -8,9 +8,12 @@
   There is no need to map nodes to integer numbers.
   This makes handling in applications much more comfortable,
   thus the package name.
-  .
-  Currently the package does not contain any advanced algorithm,
-  just the data structure and some manipulation functions.
+  This is especially useful for applications
+  where there is no simple mapping of your node identifiers to integers
+  or where the set of nodes is extended or reduced frequently.
+  However, this flexibility comes with some costs.
+  Since the structure is based on 'Data.Map.Map's,
+  for efficient computing the node type should support fast comparison.
   .
   The edge type can be freely chosen.
   This allows great flexibility
@@ -26,7 +29,7 @@
   * You may define an edge type with an additional identifier
     in order to support multiple edges between the same pair of nodes.
   .
-  * Using type functions on the node type
+  * Using type functions with the node type as parameter
     you may even define an edge type for nodes from a Cartesian product,
     where only \"horizontal\" and \"vertical\" edges are allowed.
   .
@@ -34,6 +37,9 @@
   The @ResistorCube@ test demonstrates non-integer node types
   and the @Tree@ test demonstrates multigraphs.
   .
+  Currently the package does not contain any advanced algorithm,
+  just the data structure and some manipulation functions.
+  .
   The package is plain Haskell 98.
   .
   Related packages:
@@ -53,7 +59,7 @@
   Makefile
 
 Source-Repository this
-  Tag:         0.0.3.2
+  Tag:         0.0.3.3
   Type:        darcs
   Location:    https://hub.darcs.net/thielema/comfort-graph
 
@@ -71,7 +77,7 @@
   Build-Depends:
     QuickCheck >=2.5 && <3,
     containers >=0.4 && <0.7,
-    transformers >=0.5 && <0.6,
+    transformers >=0.5 && <0.7,
     semigroups >=0.1 && <1.0,
     utility-ht >=0.0.10 && <0.1,
     base >=4.5 && <5