diff --git a/RELEASE-NOTES b/RELEASE-NOTES
--- a/RELEASE-NOTES
+++ b/RELEASE-NOTES
@@ -1,2 +1,3 @@
 0.1 - initial release  23/09/2010
-
+0.2 - ?
+0.3 - fixed ambiguous import with more recent QuickCheck library 21/07/2023
diff --git a/src/Main.hs b/src/Main.hs
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -128,7 +128,7 @@
 
 
 signature =
-    address << [toHtml "Pedro Vasconcelos <pbv@ncc.up.pt>",
+    address << [toHtml "Pedro Vasconcelos <pbv@dcc.fc.up.pt>",
                 br,
                 toHtml "LIACC, University of Porto, PORTUGAL"]
         
diff --git a/src/Parser.hs b/src/Parser.hs
--- a/src/Parser.hs
+++ b/src/Parser.hs
@@ -14,7 +14,7 @@
 import Control.Monad
 import Data.Char
 import Data.List (intersperse)
-import Test.QuickCheck
+import Test.QuickCheck hiding (Fun)
 
 -- setup a tokenizer
 lexer :: P.TokenParser ()
diff --git a/tableaux.cabal b/tableaux.cabal
--- a/tableaux.cabal
+++ b/tableaux.cabal
@@ -1,5 +1,5 @@
 name:    tableaux
-version: 0.2
+version: 0.3
 
 category: Theorem Provers
 
@@ -13,28 +13,28 @@
   web server supporting the CGI interface.
   
 
-author:     Pedro Vasconcelos <pbv@ncc.up.pt>
-maintainer: Pedro Vasconcelos <pbv@ncc.up.pt>
+author:     Pedro Vasconcelos <pbv@dcc.fc.up.pt>
+maintainer: Pedro Vasconcelos <pbv@dcc.fc.up.pt>
 
 license:      BSD3
 license-file: LICENSE
 
 build-type:    Simple
-cabal-version: >= 1.6
+cabal-version: >= 1.10
 
 extra-source-files:
   README INSTALL RELEASE-NOTES 
 
 executable tableaux.cgi
+  default-language: Haskell2010
   hs-source-dirs:   src
   main-is:          Main.hs
   other-modules:    FOL Unify Tableaux Markup CSS Parser Zipper Examples Util 
   build-depends:
     base       >= 4       && < 5,
-    containers,
-    mtl >= 1.1,
-    html >= 1.0,
-    parsec >= 2.1,
-    cgi >= 3001.1,
-    QuickCheck >= 2.1
-
+    QuickCheck       >= 2.13.2 && < 2.14,
+    containers       >= 0.6.2 && < 0.7,
+    cgi              >= 3001.5.0 && < 3001.6,
+    mtl              >= 2.2.2 && < 2.3,
+    parsec           >= 3.1.14 && < 3.2,
+    html             >= 1.0.1 && < 1.1
