diff --git a/resistor-cube.cabal b/resistor-cube.cabal
--- a/resistor-cube.cabal
+++ b/resistor-cube.cabal
@@ -1,5 +1,5 @@
 Name:                resistor-cube
-Version:             0.0
+Version:             0.0.0.1
 Synopsis:            Compute total resistance of a cube of resistors
 Description:
   This is an example of how to compute the total resistance
@@ -17,7 +17,7 @@
 Cabal-Version:       >=1.10
 
 Source-Repository this
-  Tag:         0.0
+  Tag:         0.0.0.1
   Type:        darcs
   Location:    http://hub.darcs.net/thielema/resistor-cube
 
@@ -29,8 +29,9 @@
   Main-is:             Main.hs
   Build-Depends:
     hmatrix >=0.16 && <0.17,
-    transformers >=0.3 && <0.4,
+    transformers >=0.3 && <0.5,
     utility-ht >=0.0 && <0.1,
     base >=4.5 && <4.6
   Hs-Source-Dirs:      src
   Default-Language:    Haskell2010
+  GHC-Options:         -Wall