diff --git a/src/Text/Layout/Table.hs b/src/Text/Layout/Table.hs
--- a/src/Text/Layout/Table.hs
+++ b/src/Text/Layout/Table.hs
@@ -387,9 +387,11 @@
 
 -- | Produce an 'AlignInfo' that is wide enough to hold inputs of both given
 -- 'AlignInfo's.
+instance Semigroup AlignInfo where
+    AlignInfo ll lr <> AlignInfo rl rr = AlignInfo (max ll rl) (max lr rr)
+
 instance Monoid AlignInfo where
     mempty = AlignInfo 0 0
-    mappend (AlignInfo ll lr) (AlignInfo rl rr) = AlignInfo (max ll rl) (max lr rr)
 
 -- | Derive the 'ColModInfo' by using layout specifications and the actual cells
 -- of a column.
diff --git a/table-layout.cabal b/table-layout.cabal
--- a/table-layout.cabal
+++ b/table-layout.cabal
@@ -6,7 +6,7 @@
 -- PVP summary:      +-+------- breaking API changes
 --                   | | +----- non-breaking API additions
 --                   | | | +--- code changes with no API change
-version:             0.8.0.1
+version:             0.8.0.2
 
 synopsis:            Layout text as grid or table.
 
@@ -76,7 +76,7 @@
                        MultiWayIf
   
   -- Other library packages from which modules are imported.
-  build-depends:       base >=4.8 && <4.11,
+  build-depends:       base >=4.8 && <4.12,
                        data-default-class >=0.1.1 && < 0.2,
                        data-default-instances-base ==0.1.*
 
@@ -87,7 +87,7 @@
 
 executable table-layout-test-styles
   main-is:             Test.hs
-  build-depends:       base >=4.8 && <4.11,
+  build-depends:       base >=4.8 && <4.12,
                        data-default-class >=0.1.1 && < 0.2,
                        data-default-instances-base ==0.1.*
   hs-source-dirs:      src
@@ -111,8 +111,8 @@
   type:                exitcode-stdio-1.0
   hs-source-dirs:      test-suite, src
   main-is:             Spec.hs
-  build-depends:       base >=4.8 && <4.11,
-                       QuickCheck >=2.8 && < 2.11,
+  build-depends:       base >=4.8 && <4.12,
+                       QuickCheck >=2.8 && < 2.12,
                        HUnit >=1.3,
                        data-default-class >=0.1.1 && < 0.2,
                        data-default-instances-base ==0.1.*,