diff --git a/gsc-weighting.cabal b/gsc-weighting.cabal
--- a/gsc-weighting.cabal
+++ b/gsc-weighting.cabal
@@ -1,5 +1,5 @@
 Name:                gsc-weighting
-Version:             0.1.1
+Version:             0.1.1.1
 Synopsis:            Generic implementation of Gerstein/Sonnhammer/Chothia weighting.
 License:             BSD3
 License-file:        LICENSE
@@ -22,14 +22,25 @@
   use @UPGMA@ as linkage and residue identity as distance
   function when creating the dendrogram.
   .
+  Changes in version 0.1.1.1:
+  .
+  * Use an stricter upper bound on @hierachical-clustering@.
+  .
   Changes in version 0.1.1:
   .
   * Now works even when some (or all) branches have distance zero
     (i.e. elements below that branches are all equal with respect
     to distance metric that was used to create the dendrogram).
 
+
+Source-repository head
+  type: darcs
+  location: http://patch-tag.com/r/felipe/gsc-weighting
+
 Library
   Exposed-modules:
     Data.Weighting.GSC
-  Build-depends: base == 4.*, hierarchical-clustering == 0.*
+  Build-depends:
+      base                    == 4.*
+    , hierarchical-clustering >= 0.1 && < 0.4
   GHC-options: -Wall