diff --git a/src/Data/Rewriting/CriticalPair/Ops.hs b/src/Data/Rewriting/CriticalPair/Ops.hs
--- a/src/Data/Rewriting/CriticalPair/Ops.hs
+++ b/src/Data/Rewriting/CriticalPair/Ops.hs
@@ -94,7 +94,7 @@
 cpsIn trs1 trs2 = do
     rl <- trs1
     rr <- trs2
-    cpOut rl rr
+    cpIn rl rr
 
 -- | Determine outer critical pairs for a pair of TRSs.
 --
@@ -104,7 +104,7 @@
 cpsOut trs1 trs2 = do
     rl <- trs1
     rr <- trs2
-    cpIn rl rr
+    cpOut rl rr
 
 
 -- | Determine all critical pairs of a single TRS with itself.
diff --git a/term-rewriting.cabal b/term-rewriting.cabal
--- a/term-rewriting.cabal
+++ b/term-rewriting.cabal
@@ -1,10 +1,11 @@
 name:          term-rewriting
-version:       0.1.2
+version:       0.1.2.1
 stability:     experimental
 author:        Martin Avanzini,
                Bertram Felgenhauer,
                Christian Sternagel,
                Ilya Epifanov
+homepage:      http://cl-informatik.uibk.ac.at/software/haskell-rewriting/
 maintainer:    haskell-rewriting@informatik.uibk.ac.at
 license:       MIT
 license-file:  LICENSE